There __________great changes in our hometown in the past fifteen years.
---I haven’t seen Lucy for three days. Is she ill? ---______. Her sister told me she was in hospital.
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.