If 和Whether的填空：The question is______it is wrong.填哪个?

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If 和Whether的填空：The question is______it is wrong.填哪个?
我写的是if ,答案是whether.
我知道这个两个词有一些区别,但是这道题不是两个都可以填吗?

选择whether.
if和whether 都可以表示 "是否".比如说：I don't know if he knows the news.我不知道他是否知道这个消息.
但是当引导表语从句,同位语从句等是,只能用whether.
此句中,whether it is wrong 放在be 动词后作表语从句,因此只能用whethe

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