2009福州高中毕业班质量检查试卷: could have done的反意疑问句

I don't think he could have done so much homework last night, ______?

A. do IB. could he C. has heD. did he

提供的答案是D。我认为这是错误答案，应该选B。

《牛津6/7版》：

could 4:

You couldn't have left it on the bus, could you?

absolutely:

--They could have told us, couldn't they?--Absolutely!

refuse:

When he offered me all that money, I could hardly refuse, could I?

bad:

You'll save fifty dollars, which can't be bad, can it?