【題目】She had to practice in various weather conditions before she passed the test.

A.flyB.to flyC.flyingD.to flying

【答案】C

【解析】

句意：她在考試通過(guò)之前必須在各種條件下練習(xí)飛行。

practice doing sth練習(xí)做某事，固定搭配，動(dòng)名詞作賓語(yǔ)；fly動(dòng)詞原形，to fly 不定式，flying動(dòng)名詞；故選C。

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