单项选择题

He expressed concern that the ship might be in danger.

A. worry
B. difficulties
C. need
D. danger
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单项选择题
Those shops flourished along the highway being built.
A. appeared
B. gained
C. benefited
D. prospered
单项选择题
His motive for working so hard is that he needs money.
A. motivation
B. solution
C. motion
D. nature
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