I think_____ not difficult_____English every morningA,that;to keep doing B,it;to keep doing 为`什么呀

问题描述:

I think_____ not difficult_____English every morning
A,that;to keep doing B,it;to keep doing 为`什么呀

B

Both wrong

选B.
it做宾语从句中的形式主语.
是不是有点难懂?专业的,呵呵.