请问这道英语题选什么?为什么?谢谢!
Theearlylinearteachingmachinescouldnotjudgethestudent'sresponsenor,indeed,evendetermi...
The early linear teaching machines could not judge the student's response nor,indeed,even determine that the student ______ responded.
A. is B.was C.have D.had 展开
A. is B.was C.have D.had 展开
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