单项选择题

I ______ on seeing the manager. The service in this hotel is terrible.

A．insist
B．persist
C．affirm
D．protest
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单项选择题
I could have done it better if I______ more time.
A．have had
B．had
C．had had
D．will have had
单项选择题
My brother is now working ______ he did last year.
A．much harder than
B．more harder than
C．more than
D．much than
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