单项选择题_________ is often the case with a new idea, much preliminary activity and optimistic discussion produced no concrete proposals.
A.That
B.It
C.this
D.As
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1.单项选择题Your advice would be _________ valuable to him, who is now at a loss as to what to do first.
A.exceedingly
B.excessively
C.extensively
D.exclusively
2.单项选择题The local police are authorized to _________ anyone's movements as they think fit.
A.pause
B.halt
C.repel
D.keep
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