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
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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
单项选择题
All life on the earth ______ on the sun.
A．depends
B．carries
C．keeps
D．goes
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