[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

[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

[单项选择]Ever wonder why some people can sleep through just about anything, while others get startled awake at each and every bump in the night A new report in the August 10th issue of Current Biology, offers some insight: Sound sleepers show a distinct pattern of spontaneous brain rhythms. "We found that by measuring brain waves during sleep, we could learn a lot about how well a person’s brain can block the negative effects of sounds; the more sleep spindles your brain produces, the more likely you’ll stay asleep, even when confronted with noise," said Jeffrey Ellenbogen of Harvard Medical School.
During sleep, brain waves become slow and organized, Ellenbogen explained. Sleep spindles refer to brief bursts of faster-frequency waves. Those bursts of activity are generated by a portion of the brain called the thalamus (丘脑), which serves as a way station for most types of sensory information (everything except smell).
"The thalamus is likely preventing sensory information fro
A. Brain waves become slow and organized when we sleep.
B. We can measure brain waves during sleep.
C. A person’s brain can block the negative effects of sounds.
D. Sound sleepers show a distinct pattern of spontaneous brain rhythms.

[单项选择]I often wonder why some people won’t do what it （　） to be successful.
A. involves
B. means
C. takes
D. likes

[简答题]People often wonder why they have spend so much money at the supermarket, and often on things they didn’t intend to buy in the first place. A recent survey indicates that 75% of all grocery shoppers make at least one impulse buying. They may be attracted by eye-catching display, or colorful package. For those shoppers, there is a simple way of avoiding impulse buying, and saving money on groceries. That is, they should make a shopping list beforehand, and stick to it.

[单项选择]

People often wonder why historians go to so much trouble to preserve millions of books, documents and records of the past. Why do we have libraries What (1) are these documents and the (2) books Why do we (3) and save the actions of men, the negotiations of statesmen and the (4) of armies
Because, sometimes, the voice of experience can (5) us to stop, look and listen. And because, sometimes, past records, (6) interpreted, can give us (7) of what to do and what not to do.
If we are to create (8) peace forever, we must seek (9) origins in human experience and in the record of human (10) . From the story of the endurance, courage and (11) of men and women, we create the inspiration of youth. From stories of the Christian men, right down to Budapest’s heroic men of today, history records the suffering, the self-denial, the loyalty and the heroic (12) of men. Surely from these re
A. In short
B. In all
C. In addition
D. In fact