—I called you yesterday evening,but you were not in.—Sorry.I ________ in the shop with my mother.
— Must I return the book tomorrow? — No, you ________. You can keep it for three days.
Three fourths of the ________ in the country have run out.
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.