根据首字母提示填单词
1. Probably your boy threw it away, thinking it was w _ paper.
2. This had a great e __ on the future of both mother and son.
3. The police formed a h _ wall around the building.
4. The new law will reduce p of the air.
5. There was less o at t.he top of mountain.
6. Most of c was carried out of Shanxi Province in China.
7. Some plants is probably p _ ,but they can be made into meclicine.
8. N _ children are much healthier.