問題詳情

52. If you use your phone______________________walking, many accidents may happen, like bumping into walls or falling down stairs.
(A) after
(B) while
(C) under
(D) though

參考答案

答案:B
難度:簡單0.889837
統計:A(26),B(1252),C(82),D(47),E(0)

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