单项选择题

The lecture is so dull that he can't focus his attention on it.

A. depend
B. concentrate
C. rely
D. put
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单项选择题
Her sister urged her to go shopping with her.
A. suggested
B. caused
C. forced
D. promised
单项选择题
We can get inadequate money for our new project.
A. enough
B. efficient
C. marginal
D. insufficient
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