—Look at the boy running on the ground. Is it Davis?—It ______ be him. I saw him go to the teacher’s office just now.
—Why don’t you go out to play, Rose? —I’m afraid I can’t. I have much homework _________.
The cloth ___________ very soft and comfortable.
They were all very tired, but _______ of them took a rest.
I have been to Shanghai. I ____________ there last month.
A snake bit him ___________ he went to see a doctor at once.