—Who is playing the piano in the music room? Is it Mary?
—No, it ________ be her. She has ________ to Beijing on business.
couldn’t; been
can’t; gone
can’t; been
mustn’t; gone
—________ —It’s sunny today.
—Hey, guys. Do you often have a good time ________ after-school activities? —Of course, we do. And we always have a lot of time ________ soccer.
It’s ________ today. You’d better ________ to the museum.
— Simon always shares his things with others. —Oh, how ________ he is!
— I am afraid I can’t go to your party. You know, the exam is coming. — Really? ________.