As students, we must study hard, because ___________ we study, ________ grades we’ll get.
It’s time now. A.to go to school B.to go school C.go to school
—Hello! Who’s this? — A.I’m Tom. B.That’s Tom. C.This is Tom.
The man a doctor. The are nurses. A.is, woman B.are, women C.is, women
does your father ? A.What, do B.What, does C.Where, do
--- If you have any trouble, be sure to call me. ---________.