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【題目】You shouldn’t accept a lift from a person ________ you don’t know him.

A. until B. unless C. if D. whether

【答案】C

【解析】

試題分析：句意：你不應該接受一個人搭車，如果你不了解他。 A. until直到…才；B. unless除非；C. if如果；D. whether是否。故選C。

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