It took a great deal of courage to admit that all his efforts had been________.[

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It took a great deal of courage to admit that all his efforts had been________.[     ]
A. in danger
B. in turn
C. in return
D. in vain

答案

举一反三

The laboratory ________ construction will be completed by the end of this month. [     ]
A. at
B. under
C. for
D. in

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Please remember to put the books ________ before leaving the room.[     ]
A. in the place
B. in the order
C. in order
D. in need

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The square was so named________a famous black leader in history. [     ]
A. in favor of
B. in search of
C. in face of
D. in honor of

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Your daughter passed the piano exam excellently, ________, she did very well in the exam. [     ]
A. in the end
B. on the other hand
C. in other words
D. at the same time

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I’ll trade you my stamp collection ________your model boat.[     ]
A．with
B．for
C．to
D．into

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