【单选题】
4.He was working on a children’s book______ Limericks.
【单选题】
20.When he was in_____ hospital, we all went to _____ hospital to visit him .
【单选题】
17._____ breakfast I ordered still hasn’t arrived. .
【单选题】
19.We know _____ children learn from playing.
【单选题】
12. When you are _____ with the book, please don’t throw it away.
【单选题】
26. I couldn’t go to Jane’s party. It was ______ day I was babysitting for Derek and Linda.
【单选题】
29. It is cold outside. Put on your sweater or you will catch _____ cold.
【单选题】
18. Some students like to play_____ piano, while others like to play _____ football.
【单选题】
5.The whole generation was brought up to be ______ of material things, so they had great difficulty settling down to a market economy.
【单选题】
28.1. He sleeps during _____ day and works at _____ night.