— Why not come and join us in the game?— ______. But I must finish my homework first.
I don’t know _________ the problem.
Hainan is a very good island. It’s the second ________ island in China.
The accident happened ________ a cold winter morning.
— ________ fine weather it is today! — Let’s go for a picnic.
—My father has decided to _________ smoking. —That’s good news for us.