---You could have asked your teacher for help .He is kind-hearted .---Yes,a whole day _____.A .was wasted B .had wasted C .had been wasted D.would be wasted

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---You could have asked your teacher for help .He is kind-hearted .---Yes,a whole day _____.A .was wasted B .had wasted C .had been wasted D.would be wasted

---You could have asked your teacher for help .He is kind-hearted .---Yes,a whole day _____.A .was wasted B .had wasted C .had been wasted D.would be wasted
---You could have asked your teacher for help .He is kind-hearted .---Yes,a whole day _____.
A .was wasted B .had wasted C .had been wasted D.would be wasted

---You could have asked your teacher for help .He is kind-hearted .---Yes,a whole day _____.A .was wasted B .had wasted C .had been wasted D.would be wasted
C,could have done 表示本能做某事,但实际上却没有做,所以这应该是一个完成时态,但是时间是被浪费掉,是被动语态,所以选C.

C

C