— _____, Tom,Where's my doll?

— Oh, sorry, I don't know. I think _____ behind the door. [ ]

A. Excuse me, it's

B. Here you are, she's

C. I'm sorry, its

D. How are you, he's

网络世界一般存在（）、游戏性、危险性

A、知识性

B、浪漫性

C、学习性

D、虚拟性