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
We can get inadequate money for our new project.
A. enough
B. efficient
C. marginal
D. insufficient
单项选择题
The young man succeeded in getting job ultimately.
A. at first
B. at last
C. at least
D. at most
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