—How is Helen in the new school?—She is doing very well. There is to worry about.
The teacher asked the students _________________.
---Mum,_______ I watch TV?---No. Unless your homework _______________.
---When did you return to China?---_________________.
The rain has stopped. Why not ___________ the raincoat?
The book is_____________ interesting __________ I can’t even drop it for a minute.