(2013·泰安模拟)Although   to be the best in a recent science competition, the student remains modest.
#79922
A
judged
B
judging
C
judge
D
having judged
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Behind the coach ________ our team wearing blue suits.
#79665
A
walk
B
have
C
is followed
D
appears
I received his mother’s telephone call at eleven.__that he was badly hurt in an accident yesterday. 
#83933
A
Then did I know
B
Only then I knew
C
Only then did I know
D
Only then knew I
Facts showed that only when they united ______ the strong enemies.
#83705
A
could they defeat
B
they could defeat
C
they did defeat
D
had they defeat