单项选择题

It is difficult for her to make the final decision now,（）she is in a delicate situation.

A. if
B. unless
C. until
D. since

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单项选择题
I wish they（）in their ball game.

A. will be succeeded
B. succeeded
C. would be successful
D. were success
单项选择题
How many times has the man gone to camp in summer（）

A. None.
B. Once.
C. Twice.
D. Four times.
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