問題詳情
32. I won't tell the student the answer to the math problem until he ____on it for more than an hour.
(A). has been working
(B). will have worked
(C). will have been working
(D). had worked
(A). has been working
(B). will have worked
(C). will have been working
(D). had worked
參考答案
答案：A
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)
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