单项选择题

Our dorm is so messy that it needs ______ at once.

A) to clean
B) be cleaned
C) cleaning
D) being cleaned
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单项选择题
Our boss required that everything ______ under his absolute control.
A) had to be
B) would be
C) should be
D) was
单项选择题
All his classmates congratulated him ______ his championship in the math contest.
A) in
B) for
C) on
D) with
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