题目内容：

根据中文写出单词:

1.Liu Guoliang is one of the best Ping-Pang       (教练) in China.

2.The doctor didn’t know what caused the old man’s       (眼疾).

3.The       (目的)of the activity is to raise money for the poor children.

4.Dr. Brown felt tired because he had two       (手术).

5.You can check the       (志愿者)names on the Internet.