Whose pen is this?— Oh, it’s_____. I was looking for it everywhere.
What’s wrong with my son, doctor? — ____________ serious, just a slight cold. He’d better drink some water.
Looking out of the window of my room, ___ a tall tree in the yard.
He could see the tall chimneys(烟囱) of the factory ______.
I think Miss Gao must be in the library. She said she would go there. —No, she ___________ be there. I have just been there.