[单项选择]Why may it happen in the future that people working in Europe will have to pay much higher taxes（　）.
A. Because more and more children will be given birth.
B. Because they will earn more money.
C. Because they will have higher living standards.
D. Because the number of retired people will become even larger.

[单项选择]Why may chocolate help people prevent heart disease
A. Because it contains little fat.
B. Because it contains flavonoids.
C. Because it is so tasty.
D. Because it contains lots of vitamin.

[单项选择]Why may people not follow closely the traffic laws in small towns [A] Because the streets are not crowded. [B] Because people don’t like the laws. [C] Because cars take care of the people.

[简答题]Why may some people be reluctant to take credit for their own success

[填空题]The Web Lifestyle
If you ask people today why they use telephone to communicate with their friends or why they turn to television for entertainment, they would
(34) look at you as if you were crazy. We don’t think about a telephone or a
(35) television or a car as if being strange things. These things have become
(36) such an integral part of life that they are no longer noticed, therefore, let
(37) alone are remarked upon. In the same way, within a decade no one will
(38) notice the web. It will just be there, with an integral part of life. It will be
(39) a reflex to turn to the web for shopping, education, entertainment and
(40) communication, just as it is natural today to pick up the telephone call to
(41) talk to someone. There is incredible huge interest in the web. Yet it is
(42) still infancy.

[填空题]Many people wonder why some men want to live on the moon. It is (1) not the kind of place where most men would choose to live. But man has always moved to new areas.
Some scientists hope that continued work will be done on the moon. Many experiments will be done there more (2) . Some large (3) are very easy to do in a place without air. Matter can be heated to very high temperatures without (4) change when it is in such a place. Air, dust, and clouds cannot (5) man’s view of space from the moon. The very high or very low temperatures and low gravity on the moon will be used for many experiments. One very important use of the moon will be to (6) spaceship.
Man might be able to learn much about his own body by living on the moon. He would be living in a habitat that he made for himself. Man would be in control of the (7) of life in which he lives. (8) could be removed from the air in this