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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单项选择题
Mr. Brown had the report ______ as soon as he finished ______ it.
A．to be typed, to write
B．typed, to write
C．being typed, writing
D．typed, writing
单项选择题
That is the robber ______ arrest a reward was offered:
A．for whom
B．for whose
C．about Whom
D．about whose
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