27. It is dangerous ____ your seatbelt fastened during the entire flight. (A)to keep (B)that keeping

問題詳情

27. It is dangerous ____ your seatbelt fastened during the
entire flight.
(A)to keep
(B)that keeping
(C)not to keep
(D)to not
keeping

參考答案

答案：C

統計：A:2,B:1,C:6,D:1,E:0

難度：計算中

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