He has two pets. One is a dog, ______ is a cat.
— Many students don’t know how to __________stress and become worried.— I think they’d better ask their teachers for help.
— Do you often play ________football with your friends?— No, I don’t like sports. I often play _______ piano in my free time.
— Pudong Airport, please. I have to be there by 7:00.— ______________, but I'll do my best.
It is difficult for us to learn a lesson in life we’ve in fact had that lesson.
I want to _________ at the meeting, but in the end I _________ nothing.