一How did you do on the test?
一Not so well. I much better but I misread the directions for Part One.
A. could do
B. could have done
C. must have done
D. should do
网友回答
A. could do
(答案→)B. could have done
C. must have done
D. should do
解析：考查情态动词用法。“情态动词+动词原形”表示对现在情况的推测；“情态动词+have done”表示对过去的推测或者虚拟，本题是对过去的推测，故使用“情态动词+have done”。Could have done much better本可以做得更好。句意：—你在考试中表现怎么样？—不是很好，我本可以做得更好，但我看错了第一部分的要求。故B正确。
考点:考查情态动词用法