刘德华世界第一等谐音:I realized her the moment I saw her. the前面为什么不能加at

I realized her the moment I saw her. the前面为什么不能加at 翻译此句子"oh,I'm sorry ,I can't wait fou her.would you please give the box to her? i saw her ___(哭) in the room. I shouted loudly__ her when I saw her walking past the street.A.in B.on C.at D.for I'm not _____(确定). _____(也许)I'll give her some flowers. The soon realized that,____,the situation would get worse. I'm not the girl I'm lost in the forest i'm going to the sky I`m the best！ 是什么意思？？？中文！！！