Which of the following would interest visitors the most，according to the man？
A. Permanent collections．
B. Classical exhibits．
C. Historical events．
D. Special shows．
查看答案
【C17】
A. on
B. for
C. out
D. at
Who are the loneliest among these people according to the speaker？
A. Children．
B. Young people．
C. The middle-aged．
D. Old people．
How many people overcame the loneliness after a few months？
A. More than 13 percent．
B. More then 18 percent．
C. More than 37 percent．
D. More than 50 percent．
How often do most people blink normally？
A. Once a minute.
B. Once every 4 seconds.
C. Once a tenth of a second.
D. Once a second.
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