单项选择题

A．They reduce a person’’s appetite.
B．They make a person less persistent in face of trouble.
C．They make a person’’s nervous system weak.
D．They make a person more vulnerable to disease.
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单项选择题
To the forecasters, the troublesome problem is _________.
A．it’’s hard to tell disastrous submarine earthquake
B．people don’’t take much notice of their warning
C．tsunamis are rare
D．where to get money for the false alarms
单项选择题
A．The man doesn’’t have to study a foreign language.B．The man just passed the foreign language test.C．The man’’s advisor gave him some good advice.D．The man doesn’’t have to take the final exam.
A．The man doesn’’t have to study a foreign language.
B．The man just passed the foreign language test.
C．The man’’s advisor gave him some good advice.
D．The man doesn’’t have to take the final exam.
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