Why did the people in the research feel lonely？
A. They were self-conscious．
B. They were not adaptable．
C. They were homesick．
D. They were too proud．
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．
【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．
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