(共4课时)
Ⅰ. 根据句意及括号内所给单词的提示填空。
1. They are making _________(paper) from wood (木材).
2. The city will be more crowded and _________(pollute) in 20 years.
3. The picture shows six of the nine _________(planet) in the solar system (太阳系).
4. Last week the students _________(plant) thirty trees around their school.
Ⅱ. 根据句意及所给首字母提示，补全句中所缺单词。
1. Many fish in the river died because of water p .
2. We all know that the moon goes around the e .
3. A bad home e can affect (影响) a child’s growth.
4. Who knows what will happen in the f ?