.Look! The students _____ the classroom.A.clean B.are cleaning C.are clean
—Have you finished drawing your picture , Tom? —Certainly, Mum. I have drawn it . Can I go out for a walk now?
A couple of years ________ since the earthquake took place in Wenchuan.
—My father’s just come back from work, __________? — __________. He is having a rest in the room.
— I don’t like my life in this school. I sometimes feel so_____ and helpless. — I don’t think so. You are never____ because all your classmates are ready to help you.
— When did your parents __________? — They ___________ for 20 years.