The best title for this passage would be ______.

A. don‘t like to naps

B. are terribly worried about their national debt

C. sleep less than is good for them

D. have caused many industrial and traffic accidents

A. warn us of the wickedness of napping

B. explain the danger of sleepiness

C. discuss the side effects of napping

D. convince the reader of the necessity of napping

A. the traditional misconception the Americans have about sleep

B. the new sleep policy of Clinton Administration

C. the rapid development of American industry

D. the Americans‘ worry about the danger of sleepiness

A. preferable to have a sound sleep before a night shift

B. good practice to eat something light before we go to bed

C. essential to make up for lost sleep

D. natural to take a nap whenever we feel the need for it

A. were very rich

B. lived in poverty

C. had the good things on the first three levels

D. did not own automobiles

A. The more goods the better.

B. The more mental satisfaction the better.

C. The more “luxury” items the better.

D. The more earnings the better.

A. would be little better than the fourth level

B. may be a lot more desirable than the first four

C. can be the last and most satisfying level

D. will become attainable before the government takes actions

A. deadly B. very serious

C. fatal D. not serious

A. I've never been B. I'd never been

C. I've never gone D. I'd never gone

A. to go B. have go

C. have gone D. going