英语（根据情景,填写恰当的句子不全对话）
A:What are you doing,Tom?
B:I'm looking for my new pen.
A:(1)_____________________?
B:I bought it yesterday.
A;(2)___________________?
B:It is red.I like it very much.
A:Let me help you.Is it in your bag?
B:(3)___________________.
A:Did you leave it at home?
B:(4)___________________.i put it in my pencil case this morning.
A:Oh!Is that pen under Kate's chair yours?
B:Yes,it is.(5)____________________.
A:You're welcome.