Planes, cars and trains are used __________ businessmen __________ travelling.

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问题 Planes, cars and trains are used __________ businessmen __________ travelling.

选项 A、on... for
B、for.., on
C、by... for

答案C

解析 be use dby表示被某人使用。be used for表示用来干什么。be used by sb.for doing sth.被某人用来干某事。beusedas表示被用作。
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