can you come to my party this weekend?

问题描述:

can you come to my party this weekend?
I'm afraid I can't .I ___ to Shanghai on business.
a.am going b.should go
为什么不可以选B?

选A
A的意思是我将因公务到上海
B的意思是我应该因公务去上海
根据意思应该选A