题目内容：

i,m waiting for my friend
I‘m waiting for my friend -------.I'll go shopping alone.
A If she comes B If she will come C If she doesn't come D If she didn't come

优质解答

C If she doesn't come
alone 一个人,说明朋友没来的话,我会一个人去购物,因此排除A B,根据时态可以确定.