問題詳情

25. The teacher told the class that all the lights must _____ before they leave the classroom.
(A)be switched off
(B)be switch
(C)switch off
(D)switch

參考答案

答案:A
難度:非常簡單0.90604
統計:A(135),B(3),C(10),D(1),E(0)

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