While _______ in London, the young engineer picked up some English.

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问题 While _______ in London, the young engineer picked up some English.

选项 A、staying
B、stay
C、stayed
D、to stay

答案A

解析 本题要用现在分词短语作时间状语。现在分词作状语时,现在分词的动作就是句子主语的动作,它们之间的关系是主谓关系;过去分词作状语时,过去分词表示的动作是句子主语承受的动作,它们之间的关系是动宾关系。另外,分词作状语时前面可用when,while,once,if,unless,though等连词。例如: While walking along the street early in the morning,he saw her.(早晨在街上散步时,他看到了她。)
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