单项选择题

Once the problem of the engine , all other problems will be readily solved.

A．solve
B．solved
C．is solved
D．will be solved
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单项选择题
If I had remembered the window, the thief would not have got in.
A．to close
B．closing
C．to have closed
D．having closed
单项选择题
If you a moment, I'll ask the manager to talk with you about the recent developments of the factory.
A．waited
B．are waiting
C．wait
D．have waited
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