you know……?A.when they have a discussion about B.How didi they arrive there C.what we will do next D.If he is a doctor or not答案貌似是C.D为什么不可以?

分类: 作业答案 • 2021-12-20 02:27:37

问题描述：

you know……?
A.when they have a discussion about B.How didi they arrive there
C.what we will do next D.If he is a doctor or not
答案貌似是C.D为什么不可以?

答

c 没错。
一般是whether...or not. 而不用if ...or not

答

D中的if要换成whether就可以了.因为后面有or not ,所以只能用whether,不能用if.