单项选择题

The physicist has made a discovery, _________of great importance to the progress of science and technology.

A．I think which is
B．that I think is
C．which I think is
D．which 1 think it is
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单项选择题
Even sensible men do ______ things sometimes.
A．abrupt
B．absurd
C．acute
D．apt
单项选择题
Many hands make light work. ______ , with united effort the task is easily accomplished.
A．In other words
B．In a word
C．In word
D．Without many words
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