Question

It was not a good idea to go skating. You __________your leg.

A．can break	B．could break
C．could have broken	D．could have been broken

Answer 1

C

本题关键为抓住题中提供的信息。“It was not a good idea'’表明动作发生于过去，情态动词后接动词完成式表明对过去动作的猜测。