一．根据首字母或汉语提示写出符合句子意思的单词：：
1. A lot of industrial countries are facing e_______ （环境）problems.
2. Jack quickly s_______ （总结）the main points of his plan.
3. Women have yet to achieve full e_______ with men in the work places.
4. Man has at last realized the importance to live in h_________ with other creatures.
