1 . 词性转换
1. emotion：adj.__________________
2. mere：adv.___________________
3. locate：n._____________________
4. official：adv._________________
5. classify：n.___________________
6. estimate：n.___________________
7. thorough：adv.________________
8. steady：adv.__________________
9. globe：adj. ___________________
10. admire：n. ____________________

4 . China has given top ______to the protection of ecological environment, contributing Chinese wisdom to resolving global pollution.

A．priority

B．authority

C．classification

D．emergency

7 . 词性转换
1. vary v变化→________n. 变化物，变体；差异，变动
2. official adj. 官方的，正式的→________adv. 官方地，正式地
3. classify vt. 将……分类；把……归入一类→________n. 归类，分类，分级
4. oppose v. 反对→________adj. 与某事物相反；反对某事物，不赞成某事物
5. depress v. 使沮丧→________adj. 令人沮丧的，让人忧愁的
6. steady adj. 稳定的→________adv. 稳定地
7. try v. 尝试→________n. 试验；审判，审理
8. system n. 系统→________adj. 系统化的，有条理的

8 . A proper book____________(classify) system would be of great help, since most parents do not know which books suit their children’s reading levels most. (所给词的适当形式填空)

9 . Class means a person’s economic position, a commonly used ________ (classify) of which is lower class, middle class and upper class. （所给词的适当形式填空）