We will play football if it ________ this Saturday.
doesn't snow
won't snow
isn't snowing
didn't snow
We don’t believe _____ little children can do ____ much work in such a short time.
---Could you tell me when your father___back? ---I’m not sure now. but when he ___next week, I’ll tell you.
---____enjoyable TB program on Channel 5! ---I agree.
The firemen ____the fire as soon as they got to burning buildings.
Has he ever been heard __about his trip to the lonely island?