Iwon'ttellthestudenttheanswer

发布时间：2020-07-28 17:45:41

I won't tell the student the answer to the math problem until he ________ on it for more than an hour．A.has been workingB.will have workedC.will have been workingD.isn't working

网友回答

A解析“直到学生做了一个多小时，我才会告诉他数学题的
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