Mrs. Black doesn’t know if her American friend_____ to Heilongjiang. If he_____ here, she will meet him at the airport.[ ]

Do you know David?— Yes, I met _________ at your party.

Alice is fond of playing _______ piano while Tom is interested in listening to_____ music.

Which of the two cameras are you going to buy?—I’ll buyof them，so I can give one to my friend．

Can you tell me Kitty’s address.－I don’t know, either. But I’ll tell you her address when she ______ to me.