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
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
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。