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
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单项选择题
Every man and woman ______ some history, enough at least, to survive in the world.
A．knows
B．know
C．is known
D．are known
单项选择题
John______ be in New York because I saw him in town only a few minutes ago.
A．mustn't
B．can't
C．may not
D．isn't able to
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