单项选择题

______for your help, we' d never have been able to get over the difficulties.

A. Had it not
B. If it were not
C. Had it not been
D. If we had not been
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Nobody came to see me while I was out, _____
A. did they
B. didn't they
C. did she
D. didn't she
单项选择题
Bronze ______ with ease or grow brittle quickly, as copper does.
A. not bending

B. does not bend
C. that does not bend
D. to not bend
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