—Susan stays alone in the classroom and looks sad.—_____________to her?A What happens B What has happened C What is happening D What was happening
I in this city since I five.
---It’s so hot here. Do you mind ____________ the window? ---____________. I will do it right now.
He can’t state clearly how long he has ___________ the bicycle?
This house is __________ for a family of five ___________.
---Why not stop __________ a rest? --- Oh, it’s so exciting that I can’t stop ____________ the model plane.