By the time you come back, your aunt ______ for Nanjing to attend a meeting.

You know the boy is ____ playing the piano.

______ do you like the trip to Wuhan?－It’s wonderful.

He was finally admitted to Beijing University. Never in all his life ______ so happy.

Hello, this is Jack. May I speak to Tom?– Sorry, he isn’t in at the moment. If he _______ back, I’ll ask him to call you back.