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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单项选择题
Jenny ______ have kept her word. I wonder why she changed her mind.
A．must
B．should
C．need
D．would
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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