(A) are …do (B) were…were doing (C) have been…have done(D) are…are doing

問題詳情

(A) are …do
(B) were…were doing
(C) have been…have done
(D) are…are doing

參考答案

答案：C
難度：困難0.333333
統計：A(0),B(4),C(4),D(2),E(0)

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