you know……?A.when they have a discussion about B.How didi th

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?

l阿抱 1年前已收到2个回答举报

玻璃五色幼苗

共回答了19个问题采纳率：94.7% 举报

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.

1年前

绿蝴蝶1031 幼苗

共回答了402个问题举报

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

1年前

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