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    Walking in space sound easy, yet great care and skills are required. A.may B.shall C.should D.must 【查看更多】

     

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    Walking in space _________sound easy, yet great care and skills are required.

      A.may            B.shall             C.should          D.must

     

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    Walking in space _________sound easy, yet great care and skills are required.

      A.may            B.shall             C.should          D.must

    查看答案和解析>>


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