7. kept　　　　　 8. came

5. worried　　　 6. used

3. exciting　　　 4. meant

1. knew　　　　　 2. done

白求恩大夫在一九三八年三月底到达延安。一年零八个月以后他去世了。他在中国期间曾经在十分艰苦的 条件下工作。他护理伤员，训练医务人员，建立部队医院并组织医疗队到前线或敌后服务。他很少休息，有时他骑马长途跋涉到需要他的地方去。

一九三八年八月白求恩大夫写信给朋友说：“我确实很累，可是我想我好久以来都没有像现在这样快乐。人们需要我。我很幸运能和这些致力于共产主义的同志们一块儿工作。”

6. I want to (或I'd like to)go to Beijing/Peking University. Can you tell me(或Would you mind telling me)which number bus to take and where the bus stop is?

5. He handed to(或gave)the policeman the money he had picked up (或found)in the theatre.

4. Turn on the radio, please. It's time for the eight o'clock news.

3. Do you know what an atom is?

2. Let's go and help Aunt Li(to)clean her room.