单项选择题

You think it's easy You should try ______ for once.

A．doing
B．doing it
C．to do
D．to do it
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单项选择题
William found that even his heavy overcoat was not ______ to keep out the cutting wind.
A．adequate
B．suitable
C．strong
D．positive
单项选择题
It suddenly occurred to her that money couldn't ______ all that Bob had suffered in the past live years.
A．live up to
B．make out
C．make up for
D．live through
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