_______a microscope we can see different kinds of things that are unable to be seen by our naked eyes.A.In terms of B.In place of C.By means of D.By far

资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.

People who suffer from astigmatism have______.

A.a difficulty that can be corrected by an operation
B.eyes that are not exactly the right shape
C.an eye difficulty that cannot be corrected by glasses
D.one eye bigger than the other

资料：Procrastination comes in many disguises. We might resolve to tackle a task, but find endless reasons to defer it. We might prioritize things we can readily tick off our to-do list- answering emails, say- while leaving the big, complex stuff untouched for another day. We can look and feel busy. while artfully avoiding the tanks that really matter. And when we look at those rolling, long untouched items at the bottom of our to-do list, we can't help but feel a little disappointed in ourselves.
The problem is our brains are programmed to procrastinate. In general, we all tend to struggle with task that promise future upside in return for efforts we take now. That's because it's easier for our brains to process concrete rather than abstract things, and the immediate hassle is very tangible compared with those unknowable, uncertain future benefits. So the short-term effort easily dominates the long-term upside in our minds--an example of something that behavioral scientists call present bias.
How can you become less myopic about your elusive tasks? It's all about rebalancing the cost benefit analysis: make the benefits of action feel bigger, and the costs of action feel smaller. The reward for doing a pestering task needs to feel larger than the immediate pain of tacking it.
To make the benefits of action feel bigger and more real:
Visualize how great it will be to get it done. Researchers have discovered that people are more likely to save for their future retirement if they're shown digitally aged photographs of themselves. Why? Because it makes their future self feel more real-making the future benefits of saving also feel more weighty.

Which one is TRUE about our brain?

A.Concrete things are more attractive than the abstract things.
B.The long term upside is easily dominated by short-term effort in our minds.
C.We cannot avoid present bias in our brain.
D.The brain can be trained to procrastinate often.

资料：Procrastination comes in many disguises. We might resolve to tackle a task, but find endless reasons to defer it. We might prioritize things we can readily tick off our to-do list- answering emails, say- while leaving the big, complex stuff untouched for another day. We can look and feel busy. while artfully avoiding the tanks that really matter. And when we look at those rolling, long untouched items at the bottom of our to-do list, we can't help but feel a little disappointed in ourselves.
The problem is our brains are programmed to procrastinate. In general, we all tend to struggle with task that promise future upside in return for efforts we take now. That's because it's easier for our brains to process concrete rather than abstract things, and the immediate hassle is very tangible compared with those unknowable, uncertain future benefits. So the short-term effort easily dominates the long-term upside in our minds--an example of something that behavioral scientists call present bias.
How can you become less myopic about your elusive tasks? It's all about rebalancing the cost benefit analysis: make the benefits of action feel bigger, and the costs of action feel smaller. The reward for doing a pestering task needs to feel larger than the immediate pain of tacking it.
To make the benefits of action feel bigger and more real:
Visualize how great it will be to get it done. Researchers have discovered that people are more likely to save for their future retirement if they're shown digitally aged photographs of themselves. Why? Because it makes their future self feel more real-making the future benefits of saving also feel more weighty.

According to the author, which can NOT be seen as the way of procrastination?

A.We prioritize the to-do list and finish the task in time.
B.We prioritize and only do things that can be done easily and quickly.
C.We look busy but avoid the task that really matters.
D.We find endless reasons to defer a task.

共用题干
The Need to Remember
Some people say they have no memory at all:"I just can't remember a thing!"But of course we all have a memory.Our memory tells us who we are.Our memory helps us to make use in the present of what we have learnt in the past.
In fact we have different types of memory.For example,our visual memory helps us recall facts and places.Some people have such a strong visual memory that they can remember exactly what they have seen,for example,pages of a book,as a complete picture.
Our verbal（言语的）memory helps us remember words and figures we may have heard but not seen or written:Items of a shopping list,a chemical formula,dates,or a recipe.
With our emotional（情感的）memory, we recall situations or places where we had; strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell,taste, touch and sound,and for performing physical movements.
We have two ways of storing any of these memories. Our short-term memory stores items for up to thirty seconds-enough to remember a telephone number while we dial.Our long-term mem-ory,on the other hand,may store items for a lifetime. Older people in fact have a much biter long-term memory than short-term .They may forget what they have done only a few hours ago,but have the clearest remembrance（记忆）of when they were very young.
Psychologists tell us that we only remember a few facts about our past,and that we invent the rest. It is as though we remember only the outline of a story.We then make up the details. We of-ten do this in the way we want to remember them,usually so that we appear as the heroes of our own past , or maybe victims needing sympathy（同情）.

Visual memory helps us recall a place we have been to.
A: Right
B: Wrong
C: Not mentioned

共用题干
Ecosystem
1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!
2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation（同居）between living and non-living things in a monitored environment,such as a zoo or garden.
3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms（微生物）and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.
4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.
5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement（搬迁）: imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.

Paragraph 4_________
A: What Can We Do to Help Protect Ecosystems?
B: What Are Different types of Ecosystems?
C: What Is an Ecosystem?
D: What Destroys Ecosystems?
E: How Does an Ecosystem Work?
F: Why Are Ecosystems Emportant?

资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.

Having two eyes instead of one is particularly useful for______.

A.looking over a wide area
B.seeing objects far away
C.judging distances
D.seeing at night

资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.

When things far away seem indistinct， one is probably______.

A.astigmatic
B.far-sighted
C.suffering from cataracts
D.near-sighted

资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.

We should take good care of our eyes______.

A.even if we can see well
B.only when we cannot see perfectly
C.only when we realize how important our eyes are
D.only when we can see well