将下列句子合并成宾语从句,在空格上填入合适的连接词(每空一词)
Why does he love crying? I don’t know ...
I don’t know ____ he loves crying.
答案
why
知识点:宾语从句

Why does he love crying?为特殊疑问句,充当宾语从句时,连接词要用相应的特殊疑问词。故本题答案为why。

略
