单项选择题

It is no good （） remember grammatical rules; you need to practise what you have learned.

A．trying to
B．to try to
C．try to
D．tried to

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单项选择题
（）, I'd have told you.

A．If I would have known it
B．If I had have known it
C．Had I known it
D．Should I know it
单项选择题
（） the work of a mechanic.

A．Mending cars are
B．Mending cars is
C．Mending of car is
D．The mending of car is
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