What a pity!considering his ability and experience ,he ( ) better

What a pity!considering his ability and experience ,he ( ) better

题目
What a pity!considering his ability and experience ,he ( ) better
A need have done B must have done
C can have done D might have done
不应该译为“他们本可以发挥更好”嘛~为什么用D~
答案
举一反三
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