Did you see the CCTV news on TV last night?—Yes, ______ children had a good festival on Children’s Day.

There will be more plants and animals. –I _______.We can’t live without them.

Excuse me, does Mr Smith’s son live here?－He _________ be here, but he has moved.

I’m not going swimming this afternoon.— ______. I have to help my mother do some cleaning.

To succeed in doing an experiment,________.