单项选择题

It is imperative that, he ______ full charge of the joint project.

A．take
B．taking
C．took
D．takes
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单项选择题
______, water is composed of two parts hydrogen and one part oxygen.
A．As is known
B．As be known
C．As known
D．Which is known
单项选择题
She does not believe that he is ______ the honor accorded him.
A．worth of
B．worth
C．worthy of
D．worthy
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