根据情景,选择正确的句子。
1.想知道Mum在哪里,你可以说:____
A. Where's he?
B. Where's she?
C. Where's Mum?
2.别人问你的事情如果你不知道,你可以说: _
A. He's in the study.
B. Sorry, I don't know.
C. She's in the kitchen.
3.你找不到你的小刀了,你想问别人在哪里,可以说: _
A. Where's he?
B. Where's she?
C. Where's it?
4.照相机在冰箱上,你可以说:____
A. It's on the fridge.
B. Sorry, I don't know.
C. It's in the fridge.