如果你当时意识到问题的严重性,并采取措施,结果就完全两样了。
A.Have you realized how serious the problem was then and taken some measures, the result is completely different. B.Have you realized how serious the problem was then and taken some measure, the result will have been completely different. C.Had you realized how serious the problem was then and taken some measures, the result would have been completely different.正确答案C
