【2014年辽宁省沈阳市市中考】Think of a number, _______don't tell me what it is.
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.