【题目】选择单词或短语填空。
A. keep B. shouldn’t C. instead of D. need E. save
【1】We should ________ the air clean and fresh.
【2】We ________ kill wild animals.
【3】We ________ water.
【4】We must ________ every drop of water.
【5】We should use bike ________ cars.
【答案】
【1】A
【2】B
【3】D
【4】E
【5】C
【解析】
略
