单项选择题

The mountain-climbers took every________to minimize the dangers of their trip.

A．caution
B．means
C．warning
D．precaution
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________a Muslim, I understood what he meant.
A．I
B．Myself
C．He
D．Himself
单项选择题
Mr. Frank needs no introduction from me,________
A．needn't he
B．need he
C．doesn't he
D．does he
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