单选题Many investors buy and sell shares via the internet because it is ______A far cheaperB much easierC more excitingD a lot safer

Thirty years ago, most teenagers had bicycles, but now they are comparatively rare.____56___,motor scooters (小型摩托车) are much more common.____57___, this may seem to be a sign of progress but____58___the change is not necessarily for the better.      It is easy to see why young people prefer scooters.____59___, they are much faster and do not require much physical effort,____60___, you can take a passenger with you on the pillion（后座）seat behind;____61___,they give young people a feeling of independence, because they can travel further and impress their friends.____62___, the disadvantages are equally obvious.____63___first sight, scooters are more expensive to buy and to maintain, and____64___those under 16 are not allowed to have them.____65___, greater freedom brings danger because speed encourages young people to take risks and as a result scooters are involved____66___more accidents, and the accidents are____67___more serious.         Bicycles are safer and easier to control.Years ago, teenagers had more experience with them because they____68___to ride as young children, and consequently knew what they were capable of.____69___, many young people overestimate what a scooter can do and pretend it has the power of a motorcycle.____70___, the fact is that bicycles are not very safe____71___.in cities these days because there are more cars and drivers are not used to them and do not make allowances for them.       ____72___, those who are old enough to ride scooters naturally prefer them. Those who are too young or cannot afford to buy a scooter probably 6nd bicycles slow and uncomfortable____73___,and riding bicycles requires____74___experience of traffic than before. On balance, the change has been for the worse,____75___for the 13-and 14-year-olds, but the only safe solution would be to have special lanes（车道） for cyclists. 74 A.much   B. a lot of    C.rich    D.more

What is the most useful advice for new investors?

A lot of people mistake John for Bill because they _____ each other in appearance too much!

Brokers are those people, according to the passage, who buy or sell business shares for others.

—How did you find your visit to the museum?　 —I thoroughly enjoy it. It was ______ than I expected.

Investors are attracted to Internet companies because they

Practice 4　　In the first year or so of Web business, most of the action has revolved around efforts to tap the consumer market. More recently, as the Web proved to be more than a fashion, companies have started to buy and sell products and services with one another. Such business-to-business sales make sense because businesspeople typically know what product they’re looking for.　　Nonetheless, many companies still hesitate to use the Web because of doubts about its reliability. “Businesses need to feel they can trust the pathway between them and the supplier,” says senior analyst Blane Erwin of Forrester Research.

Investors are attracted to internet companies because they ______

Some people start Buy Nothing Day because they think _____ .

Many investors buy and sell shares via the Internet because it is

After a few hours' snowing there are often some shortages of food because______.