单项选择题

He called her names ,so she won't forgive him ______ he makes an apology to her.

A．although
B．once
C．if
D．unless
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单项选择题
-- Tom, I'm afraid you should improve your English. You need some time to practice. --______.
A．OK, I will.
B．Thank you. I need.
C．I hope too.
D．I will have a good practice.
单项选择题
--I wish I had succeeded in competitions. -- Yeah, I know. But ______ hard
A．did you work
B．do you work
C．had you worked
D．have you worked
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