单项选择题

The project to clear up the polluted river ______ by the end of next year.

A．will have been completed
B．will have completed
C．is being completed
D．has been completed
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单项选择题
The book is ______ more difficult than the one I recommended to you.
A．rather
B．much
C．very
D．so
单项选择题
The committee members propose that the plan ______ postponed for a few days.
A．being
B．been
C．to be
D．be
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