You can't be image_________ great fun chatting online is.答案是what _英语解答

You can't be image_________ great fun chatting online is.
答案是what ,请问为什么不能用how great fun?

人气：328 ℃　时间：2020-02-05 15:17:06

解答

感叹句中如果名词是不可数名词或者可数名词复数,必须用what!