单项选择题

My sister’’s professor had her ______her paper many times before allowing her to present it to the committee.

A．rewritten
B．to rewrite
C．rewrite
D．rewriting
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单项选择题
One of the requirements for a fire is that the material _______ to its burning temperature.
A．is heated
B．will be heated
C．be heated
D．would be heated
单项选择题
Professor Johnson’’s retirement_______from next January.
A．carries into effect
B．takes effect
C．has effect
D．puts into effect
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