Ⅰ. 根据句意及首字母或汉语提示完成单词（5分）
1. We should try our best to protect our e_____.
2. Knives are made of m_____.
3. Good h_____！There is so much rubbish.
4. We can’t _____(浪费) time anymore.
5. Mum always help me _____ (修补) my old clothes.
Ⅱ. 用所给词的适当形式填空（5分）
1. Jack has _____(sort) his books into four kinds.
2. Paper and plastic make the _____(much) garbage.
3. He has _____(empty) two bottles of water on the ground.
