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.