22．I upset when I failed the exam.A．may be B．used to C．use to be D．used to be 【查看更多】

 

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I ______ upset when I failed the exam.
[     ]
A．may be
B．used to
C．use to be
D．used to be

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I ______ upset when I failed the exam.

A．may be          B．used to          C．use to be             D．used to be

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