While     in Scotland, he made friends with the natives there.
A．workingB．workedC．he worksD．he is working
：A
：考查狀語(yǔ)從句的省略。當(dāng)狀語(yǔ)從句的主語(yǔ)和主句主語(yǔ)一致的時(shí)候，且謂語(yǔ)動(dòng)詞為be動(dòng)詞時(shí)，可以把狀語(yǔ)從句的主語(yǔ)和be動(dòng)詞一起省略。本題在while于working之間省略了he was.因?yàn)閔e和work構(gòu)成主動(dòng)關(guān)系，所以使用現(xiàn)在分詞的形式。D項(xiàng)錯(cuò)在時(shí)態(tài)不對(duì)。
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