Iwon’ttellthestudenttheanswert

更新 2022-09-03
科目英语
题型单选题
难度中等
浏览 1290

挑错有奖

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

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