It occurred to him ______he had forgotten to take his wallet with him.A.that B.what C.when D.why请说明为什么选择该答案 谢谢各位！！！
热心网友
用that,that后面所代的是一个主语从句,意思是他忘记拿走他的钱包了这件事发生在他身上~ happened to me that i was detained by a guest suddenly~
热心网友
答案为A:that引导主语从句, it 为形式主语
热心网友
a