The old man sat down and looked at me with a(n) _______ look on his face, which made me suddenly realize that I was still a helpful person.
—Are there any students in the classroom now? —,only a few,I’m afraid.
—Sorry, I forgot to water the flowers. —.You can do it after lunch if you like.
—Mum, may I go out to play football for a while? —______. You need some exercise.
Before the sales start, I make a list of ______my kids will need for the coming season.
Stephen Hawking believes that the earth is unlikely to be the only planet______ life has developed gradually.