----- Are these your brothers?-----______________.They’re my friends.
---Must I work out the problem right now? ---Yes, you _______. It’s very serious.
We’re glad to see that Beijing is developing _______ these years than ever before.
---What time does the library open? --- ______ eight o’clock.
---I took lots of photos in Hainan. ---Really? Could you show ______ to me?
—Do you know ________? —Next month.