单项选择题

Those were the graduate assistants ______ to do the research work in the lab.

A．to whom it was their responsibility
B．whose responsibility there was
C．whose responsibility was
D．of whom with the responsibility
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单项选择题
He was ______ determined than you, but he turned out to be the first to back out.
A．no more
B．not more
C．no less
D．not less
单项选择题
Those bad conditions have given ______ to a lot of crime in the area.
A．reason
B．suspicion
C．rise
D．impulse
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