As volunteers, they should do ______to help the children in trouble.
There are ________ TV advertisements(广告) around us.
John,________ you have to wear sports shoes for gym class today?
—Will you stay here for supper?—Sorry,I ________.I’ll have to meet my uncle at the station.
—Please ________ to return my book by Friday.I’ll use it on Saturday.—No problem.I’ll finish reading it on Thursday.
—Don’t take pictures here,please.—________.