What do astronauts do to keep themselves _____around when ____

問題詳情

23. What do astronauts do to keep themselves _____around when _____ sleeping?
(A)from floating； they were
(B)not floating； they are
(C)from floating； x
(D)not to float； x

參考答案

答案：C
難度：計算中-1
書單：沒有書單，新增

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