While ______ in Scotland, he made friends with the natives there.
A．workingB．workedC．he worksD．he is working
A

試題分析：考查省略句。當狀語從句的主語和主句一致，且含有系動詞的時候�？梢园褷钫Z從句的主語和系動詞一起省略。本題while后面省略了he was；句意：當他在蘇格蘭工作的時候，他和那里的當?shù)厝顺闪撕门笥选８鶕?jù)句意說明A正確。BCD項的時態(tài)錯誤。
點評：當狀語從句的主語和主句一致，且含有系動詞的時候�？梢园褷钫Z從句的主語和系動詞一起省略。
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