Nancy is _looking___ for her pen.But she can't find it .she is _asking___ Yang Ling to _help___ her.
A:I can't __find__ my pen.__Did__ you see it?
B:No,I did't.What colour is it?
A:It's blue.
B:__Is__ it in your bag?
A:Oh,yes ,it is.Thank you,Yang Ling.
B:You're welcome.