单项选择题

The project was completed on time because the cooperation between the two companies.

A. cooperation
B. connection
C. combination
D. agreement
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The lecture is so dull that he can't focus his attention on it.
A. depend
B. concentrate
C. rely
D. put
单项选择题
Her sister urged her to go shopping with her.
A. suggested
B. caused
C. forced
D. promised
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