Do you know the boy________ is sitting next to Peter? — Yes. He is Peter’s friend. They are celebrating his ________ birthday.

He is generous _____her friends. She often shares her toys _____them. [ ]

I hear Mr. Zhang has gone to Beijing for a meeting. —Really? Do you know when he ______?

一Excuse me. Do you know___________?一Sorry,I don’t know．

What’s favorite subject?—My favorite subject is math.