题目
根据首字母提示及括号内中文释义,补全句子(每空一词)。1. Rubbish must be s______ (分类) before it is taken away. 2. Old clothes can be r______ (回收利用) to make new products. 3. Water in the school garden should not be w______ (浪费). 4. Trees are p______ (种植) around our city every spring.