单项选择题

If you can't turn the key, try ______ some oil in the lock.

A．to put
B．put
C．putting
D．to have put
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单项选择题
Those relations of his are______ . I don't want to have any dealings with them.
A．boring people
B．bored people
C．people having bored
D．people having boring
单项选择题
We wish that you ______ such a lot of work, bemuse we know that you would have enjoyed the concert.
A．didn't have had
B．didn't have
C．hadn't have
D．hadn't had
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