I () able to help you,but I was so busy.A.woud have beenB.wasC.ha_英语解答

I () able to help you,but I was so busy.
A.woud have been
B.was
C.had been
D.would be

人气：299 ℃　时间：2020-06-02 07:44:27

解答

此题考虚拟语气,选Awould have been本应是/做… 表示与过去事实相反的情况,虚拟语气
我本应该帮你,但当时我太忙了（当时很忙,本来应该帮忙,实际上没有帮）
BCD均不对.