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        1. While Helen ________ the piano,her mother came in.
          A.was playingB.is playingC.playedD.plays
          A

          試題分析:句意:當(dāng)海倫正在彈鋼琴時(shí),她的母親進(jìn)來了。While引導(dǎo)時(shí)間狀語從句,強(qiáng)調(diào)主從動(dòng)作的同時(shí)發(fā)生,從句中常用進(jìn)行時(shí)態(tài),聯(lián)系下文可知從句描述的是過去正在進(jìn)行的動(dòng)作,故用過去進(jìn)行時(shí)態(tài),選A。
          點(diǎn)評(píng):英語賓語從句的時(shí)態(tài)和主句沒有必然的聯(lián)系,需結(jié)合語境進(jìn)行具體分析。而英語狀語從句的時(shí)態(tài)與主句有比較緊密的聯(lián)系。
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