根据汉语意义，用适当的短语或单词完成英语句子。
1. 卡通人物被全世界许许多多的学生所喜爱。
Cartoon characters _____ by millions of students all over the world.
2. 因为唐明口语非常好，所以同外国人交流起来他没有任何困难。
Because his spoken English is very good, Tang Ming has _____ with foreigners.
3. 上网聊天，不仅浪费时间，而且有害健康。
_____ on the Internet is _____ wasting time, _____ doing harm to our health.
4. 保护环境是我们每个人的责任。
It is everyone's _____ our environment.
5. 为什么秋天没到树叶就变黄了？那全是空气污染所致。
Why have almost all the leaves _____ yellow _____ autumn comes? That's all _____ the air pollution.
