单选题Which of the following contains an adverbial clause of condition?A They look as though they know each other.B As soon as we arrived, the meal started.C As long as it doesn’t rain, we can play.D He has lived here as long as I (have lived).

共用题干
Step Back in Time

Do you know that we live a lot longer now than the people who were born before us?One
hundred years ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after
ourselves better. We know which foods are good for us and what we have to eat to make
sure our bodies get all the healthy things they need.We know why we sometimes get ill and
what to do to get better again.And we know how important it is to do lots of exercise to
keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let's have a look at what life was
like 100 years ago.
Families had between 15 and 20 children,although many babies didn't live long.
Children suffered from lots of diseases , especially rickets（佝偻病）and scurvy（坏血病）,
which are both caused by bad diets.This is because many families were very poor and not
able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept
standing up,bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1 920s.They kept fresh food cold by storing it on
windowsills（窗台板）,blocks of ice, or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their
parents. If you had lived 1 00 years ago , you might well be selling matchsticks（火柴杆）(a
job done by many children)or working with your dad by now.

Life was not easy for many children living 100 years ago.
A:Right
B:Wrong
C:Not mentioned

共用题干
Step Back in Time
Do you know that we live a lot longer now than the people who were born before us?One hundred years ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after ourselves better.We know which foods are good for us and what we have to eat to make sure our bodies get all the healthy things they need.We know why we sometimes get ill and what to do to get better again.And we know how important it is to do lots of exercise to keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let's have a look at what life was 100 years ago
Families had between 15 and 20 children,although many babies didn't live long.from lots of diseases , especially rickets (佝偻病）and scurvy（坏血病）,which are bot diets.This is because many families were very poor and not able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept standing up,bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1920s.They kept fresh food cold by storing it on windowsills（窗台板）,blocks of ice,or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their pai lived 100 years ago,you might well be selling matchsticks（火柴杆）(a job done by many children）or working with your dad by now.

On average women lived longer than men 100 years ago.
A:Right
B:Wrong
C:Not mentioned

共用题干
Step Back in Time

Do you know that we live a lot longer now than the people who were born before us?One hundred years
ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after ourselves better. We
know which foods are good for us and what we have to eat to make sure our bodies get all the healthy things
they need.We know why we sometimes get ill and what to do to get better again.And we know how impor-
tant it is to do lots of exercise to keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let',have a look at what life was like 100 years
ago.
Families had between 15 and 20 children,although many babies didn'I live long. Children suffered
from lots of diseases,especially rickets（佝偻病）and scurvy（坏血病）,which are both caused by bad
diets.This is because many families were very poor and not able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept standing up,
bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1920s.They kept fresh food cold by storing it on windowsills（窗台
板）,blocks of ice,or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their parents.if you had
lived 100 years ago,you might well be selling matchsticks（火柴杆）(a job done by many children) or
working with your dad by now.

Life was not easy for many children living 100 years ago.
A:Right
B:Wrong
C:Not mentioned

共用题干
Step Back in Time

Do you know that we live a lot longer now than the people who were born before us?One hundred years
ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after ourselves better. We
know which foods are good for us and what we have to eat to make sure our bodies get all the healthy things
they need.We know why we sometimes get ill and what to do to get better again.And we know how impor-
tant it is to do lots of exercise to keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let',have a look at what life was like 100 years
ago.
Families had between 15 and 20 children,although many babies didn'I live long. Children suffered
from lots of diseases,especially rickets（佝偻病）and scurvy（坏血病）,which are both caused by bad
diets.This is because many families were very poor and not able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept standing up,
bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1920s.They kept fresh food cold by storing it on windowsills（窗台
板）,blocks of ice,or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their parents.if you had
lived 100 years ago,you might well be selling matchsticks（火柴杆）(a job done by many children) or
working with your dad by now.

On average women lived longer than men 100 years ago.
A:Right
B:Wrong
C:Not mentioned

共用题干
Step Back in Time
Do you know that we live a lot longer now than the people who were born before us?One hundred years ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after ourselves better.We know which foods are good for us and what we have to eat to make sure our bodies get all the healthy things they need.We know why we sometimes get ill and what to do to get better again.And we know how important it is to do lots of exercise to keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let's have a look at what life was 100 years ago
Families had between 15 and 20 children,although many babies didn't live long.from lots of diseases , especially rickets (佝偻病）and scurvy（坏血病）,which are bot diets.This is because many families were very poor and not able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept standing up,bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1920s.They kept fresh food cold by storing it on windowsills（窗台板）,blocks of ice,or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their pai lived 100 years ago,you might well be selling matchsticks（火柴杆）(a job done by many children）or working with your dad by now.

Poor diets can lead to such diseases as rickets and scurvy.
A:Right
B:Wrong
C:Not mentioned

The author can't remember his relatives clearly because__________.

A.he didn't live very long with them
B.he was fully occupied with observing nature
C.the family was extremely large
D.he was too young when he lived with them

请阅读短文。
Looking back on my childhood, I am convinced that naturalists are born and not made.Although we were brought up in the same way, my brothers and sisters soon abandoned their pressed flowers and insects. Unlike them, I had no ear for music and languages. I was not an early reader and I could not do mental arithmetic.
Before World War I we spent our summer holidays in Hungary. I have only the dim memory of the house we lived in, of my room and my toys. Nor do I recall clearly the large family of grandparents, aunts, uncles and cousins who gathered next door. But I do have a crystal-clear memory of dogs, the farm animals, the local birds and above all, the insects.
I am a naturalist, not a scientist. I have a strong love of the natural world, and my enthusiasm has led me into varied investigations. I love discussing my favorite topics and enjoy burning the midnight oil, reading about other people's observations and discoveries. Then something happens that brings these observations together in my conscious mind. Suddenly you fancy you see the answer to the riddle, because it all seems to fit together. This has resulted in my publishing 300 papers and books, which some might honor with the title of scientific research.
But curiosity, a keen eye, a good memory and enjoyment of the animal and plant world do notmake a scientist; one of the outstanding and essential qualities required is self-discipline, a qualityI lack. A scientist can be made. A naturalist is born. If you can combine the two, you get the best of both worlds.

The author can't remember his relatives clearly because
查看材料

A．he didn't live very long with them
B．he was fully occupied with observing nature
C．the family was extremely larger
D．he was too young when he lived with them

共用题干
Step Back in Time
Do you know that we live a lot longer now than the people who were born before us?One hundred years ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after ourselves better.We know which foods are good for us and what we have to eat to make sure our bodies get all the healthy things they need.We know why we sometimes get ill and what to do to get better again.And we know how important it is to do lots of exercise to keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let's have a look at what life was 100 years ago
Families had between 15 and 20 children,although many babies didn't live long.from lots of diseases , especially rickets (佝偻病）and scurvy（坏血病）,which are bot diets.This is because many families were very poor and not able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept standing up,bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1920s.They kept fresh food cold by storing it on windowsills（窗台板）,blocks of ice,or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their pai lived 100 years ago,you might well be selling matchsticks（火柴杆）(a job done by many children）or working with your dad by now.

People in the past preferred standing up to lying down when sleeping.
A:Right
B:Wrong
C:Not mentioned

共用题干
Step Back in Time

Do you know that we live a lot longer now than the people who were born before us?One
hundred years ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after
ourselves better. We know which foods are good for us and what we have to eat to make
sure our bodies get all the healthy things they need.We know why we sometimes get ill and
what to do to get better again.And we know how important it is to do lots of exercise to
keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let's have a look at what life was
like 100 years ago.
Families had between 15 and 20 children,although many babies didn't live long.
Children suffered from lots of diseases , especially rickets（佝偻病）and scurvy（坏血病）,
which are both caused by bad diets.This is because many families were very poor and not
able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept
standing up,bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1 920s.They kept fresh food cold by storing it on
windowsills（窗台板）,blocks of ice, or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their
parents. If you had lived 1 00 years ago , you might well be selling matchsticks（火柴杆）(a
job done by many children)or working with your dad by now.

Poor diets can lead to such diseases as rickets and scurvy.
A:Right
B:Wrong
C:Not mentioned

共用题干
Step Back in Time

Do you know that we live a lot longer now than the people who were born before us?One
hundred years ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after
ourselves better. We know which foods are good for us and what we have to eat to make
sure our bodies get all the healthy things they need.We know why we sometimes get ill and
what to do to get better again.And we know how important it is to do lots of exercise to
keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let's have a look at what life was
like 100 years ago.
Families had between 15 and 20 children,although many babies didn't live long.
Children suffered from lots of diseases , especially rickets（佝偻病）and scurvy（坏血病）,
which are both caused by bad diets.This is because many families were very poor and not
able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept
standing up,bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1 920s.They kept fresh food cold by storing it on
windowsills（窗台板）,blocks of ice, or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their
parents. If you had lived 1 00 years ago , you might well be selling matchsticks（火柴杆）(a
job done by many children)or working with your dad by now.

On average women lived longer than men 1 00 years ago.
A:Right
B:Wrong
C:Not mentioned

共用题干
Step Back in Time

Do you know that we live a lot longer now than the people who were born before us?One hundred years
ago the average woman lived to be 45.But now,she can live until at least 80.
One of the main reasons for people living longer is that we know how to look after ourselves better. We
know which foods are good for us and what we have to eat to make sure our bodies get all the healthy things
they need.We know why we sometimes get ill and what to do to get better again.And we know how impor-
tant it is to do lots of exercise to keep our hearts beating healthily.
But in order that we don't slip back into bad habits,let',have a look at what life was like 100 years
ago.
Families had between 15 and 20 children,although many babies didn'I live long. Children suffered
from lots of diseases,especially rickets（佝偻病）and scurvy（坏血病）,which are both caused by bad
diets.This is because many families were very poor and not able to feed their children well.
Really poor families who lived in crowded cities like London and Manchester often slept standing up,
bending over a piece of string,because there was no room for them to lie down.
People didn't have fridges until the 1920s.They kept fresh food cold by storing it on windowsills（窗台
板）,blocks of ice,or even burying it in the garden.
Some children had to start work at the age of seven or eight to earn money for their parents.if you had
lived 100 years ago,you might well be selling matchsticks（火柴杆）(a job done by many children) or
working with your dad by now.

Poor diets can lead to such diseases as rickets and scurvy.
A:Right
B:Wrong
C:Not mentioned

The first man who cooked his food,instead of eating if raw,lived so long ago that we have no idea who he was or where he liveD.We do know,however,that for thousands of years,food was always eaten cold and（ ）.

A.raw
B.crude
C.dry
D.fresh