_____ at the news that I didn’t know what to say to comfort her.

The man in a black suit _______ be our youth worker. — I’m sure it _____ be him. I saw him in the laboratory building some minutes ago.

Are Mr. and Mrs. Wang living alone in the house? —Yes, they have three sons, but ______ of them live in their own houses.

Do you know the man _______ is talking with our English teacher?—Oh, he must be Lin Tao’s father. He was looking for Lin Tao just now.

Excuse me, is this ______ ipad?— No, it’s not mine. It’s my friend’s.