Which of the following can best explain "AIDS tests the institutions upon which our society rests" according to the passage？
AIDS is a sign of moral failure and social collapse.
B. AIDS indicates that our social systems have been vey inefficient.
C. The responses of a society to the threat of AIDS determines whether and to what extent the society can be called civilized.
D. The spreading of the fatal disease suggests that the nation's resources have been wrongly used.
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People didn't wash in those days because ______.
A. they had no water in their houses
B. they had to buy water from a water-carrier and it was expensive
C. soap was expensive, too
D. all of the above
Geothe often did outdoor skating and swimming.
A. Right
B. Wrong
C. Not mentioned
The writer's advice about alcohol before you make a speech is to take one or two drinks so
A. Right
B. Wrong
C. Not mentioned
The "American sleep debt" (Para. 3) is the result of ______.
A. the traditional misconception the Americans have about sleep
B. the new sleep policy of the Clinton Administration
C. the rapid development of American industry
D. the Americans' worry about the danger or sleepiness
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