--will you be able to come and help us clean the room.--______,i'm doing my homework.

问题描述:

--will you be able to come and help us clean the room.--______,i'm doing my homework.
a.i' love to b.i am afraid not(i' love to 后一定要跟but吗)

正确答案选B
I'd love to 后面要跟but表示转折.