凡士林

A．药物与适宜基质均匀混合制成的具有一定稠度的半固体外用制剂
B．药物与适宜基质制成的专供眼用的灭菌软膏
C．药物与适宜的辅料制成的均一、混悬或乳剂型的乳胶稠厚液体或半固体制剂
D．将药物加水煎煮、药液浓缩成浸膏，加入矫味物质制成稠厚的半流体制剂
E．药物提取物与橡胶混合物为基质混合，涂布于裱背材料上供贴敷的外用制剂o

根据汉语意思提示完成句子。

1. By 2008, the environment here will be ____________ (更加舒适).

2. Do you know what the ____________ (目的) of learning English is?

3. In our country, we will never _____________ (挨饿)

4. In the past, each family had _____________ (至少) three or four children in our country.

5. I think ____________ (空气污染) is the most serious problem in the world.