单项选择题

______ impossible to make a living in real estate, Nancy added insurance as a side line.

A. It's being
B. Its being
C. It is
D. It being
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单项选择题
Something is wrong with your truck. You'd better have it ______.
A. repairing
B. repair
C. repaired
D. to be repaired
单项选择题
______ he come tomorrow, I should give him the dictionary he needs.
A. Had
B. Should
C. Were
D. Would
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