I think Miss Lin must be in the library. She said she would go there.—No, she __________be there. I have just been there.
Sally, could you go and help your father wash the car?—Why ____________? I’m busy now. Amy is lying on the grass doing nothing.
Morgan’s parents aren’t at home. He has to ______his younger brother.
The letter____Tommy received from his company yesterday is very important.
Has Kate gone to the museum?— Yes, not only she but also her mother ____ gone to the history museum.