看图，完成对话。
1. 
A: ______ that in______?
B: ______ ______ruler．
A: ______ ______ ______ruler?
B: ______ ______under______ ______.
2. 
A: ______ ______, Kate.
______ ______ my pencils?
B: Sorry,______ ______ ______.
Are______on the backpack?
A: _____,______ ______.
B: ______ ______ under the backpack?
B: Look!______ ______ ______ the pencil
case. And the pencil case______ ______ ______ backpack.
3. 
A: ______that your______?
B: ______?
A: ______the vase(花瓶).
B: ______,______ ______. It's her key.
