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        1. Grace Brown __________ play tennis every day.
          A.isn‘tB.don’tC.a(chǎn)ren’t D.doesn’t.
          D
          本題的主語(yǔ)是單數(shù)第三人稱,故用助動(dòng)詞does構(gòu)成否定形式doesn’t,故本題選D。
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