---Look at the boy running on the playground. Is it David?---It ________ be him. I saw him go to the teachers’ office just now.
It ________ over ten years since the dog ____________.
I have _____ milk here. Would you like to drink some, Mark?A few B little C a few D a little
This is _____ and we must _____ on it.A hard work; work hard B a hard work; work hardC hard work; hard work D work hard; hard work
I don’t like physics ______ it’s too difficult for me.
—_____ do you _____ the book?—It’s very interesting.