单项选择题

It takes a great deal of power of ()a spaceship into space.

A. elevate
B. launch
C. flourish
D. take off

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单项选择题
His tone () his real feelings more than his words.

A. paraphrased
B. conformed
C. performed
D. conveyed
单项选择题
The investigation group tried in ()to discover what caused the failure of the engine.

A. diligence
B. vain
C. vigor
D. zeal
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