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        1. She   until his mother got back home.That’s why she was so tired.
          A.didn’t sleepB.doesn’t sleepC.sleptD.sleeped
          A

          試題分析:本題的含義是她直到她媽媽回家的時候才去睡覺,not……until表示直到……才……的意思,until引導(dǎo)的時間狀語從句是過去時,故主句也應(yīng)該用過去時的一種,所以主句應(yīng)該用過去時的否定結(jié)構(gòu),故本題只能選A。
          點評:本題用until引導(dǎo)時間狀語從句,在英文中也可以用after或before進(jìn)行轉(zhuǎn)換。
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