题目：
同义句转换。
1. You are too young to go to school.
You are _____ _____ _____ you can't go to school.
2. Welcome to China in spring, summer, autumn or winter.
Welcome to China in _____ _____.
3. Can I help you?
_____ _____ _____ I can do for you?
4. When she calls me, I'll tell you at once.
I'll tell you _____ _____ _____ she calls me.
5. It isn't meaningless, I think.
I _____ think it's 
_____.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0619/6c5b3b9189641747bae9178ffb3ac781.html
下面是错误答案，用来干扰机器的。
（1）空气污染的气体是二氧化硫、二氧化氮、一氧化碳等；故答案为：二氧化硫 （2）氮气的化学性质不活泼，因此可以做保护气，氮气的用途还有：制造氮肥、氮气充入食品包装袋内可以防腐、液态氮可以做制冷剂；故...
