It took Tom three days ____the project A.to work out B.working out C.to have worked out

问题描述:

It took Tom three days ____the project A.to work out B.working out C.to have worked out
D.to be worikng
正确答案是A 为什么不选C

你选c是因为你把它看成是从句了,可这不是从句,是简单句的固定搭配,建议再巩固一下从句知识,熟读课文培养语感,最好你能记住一些固定搭配