They have________signs in some places to remind (提醒)the visitors not to step on the grass.
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.
He doesn't like apples.I don't like them, ________.
I will stay at home and read some books if it ________ tomorrow.