单项选择题

() for your help, we never have been able to overcome the difficulties.

A. Had it not
B. lf it were not
C. Had it not been
D. If we had not been

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单项选择题
How much does one sweater cost()

A. Forty dollars.
B. Twenty dollars.
C. Fifty dollars.
D. Twenty-five dollars.
单项选择题
What is the probable relationship between the man and woman()

A. Boss anti secretary.
B. Friends.
C. Caller and operator.
D. Customer and house agent.
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