——I didn't drop in on Uncle Wang when I was in Beijing on business.
问题描述：
——I didn't drop in on Uncle Wang when I was in Beijing on business.
——I didn't drop in on Uncle Wang when I was in Beijing on -business.
----I think you___.After all,he once helped us out with money.
A.should have to B.ought to have
答案为B,A呢?
答
这个是“本应该做什么事”的考点
A的话应该是should have
should have done sth / ought to have done sth
不用to