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        1. 42.A.clean B.cleaned C.to clean D.cleaning 查看更多

           

          題目列表(包括答案和解析)

          We should keep our earth ________.

          [  ]

          Aclean

          Bcleaning

          Cto clean

          Dcleaned

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          Don’t put off ________ the room.

          A.clean

          B.cleaning

          C.to clean

          D.cleaned

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          --How long did you spend          the classroom?

          --Half an hour.

          A.cleaning              B.cleaned         C.to clean        D.cleans

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          It's my turn ________ the blackboard today.

          [  ]

          A.clean
          B.cleaned
          C.cleaning
          D.to clean

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          It's my turn ________ the blackboard today.

          [  ]

          A.clean
          B.cleaned
          C.cleaning
          D.to clean

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