1. How much of the water on Earth canbe drunk（可飲用的 ）？

A.1%

B. 10%

C. 90%

2.Which one cannot be recycled（可回收的）？

A.newspaper

B.clothes

C.used tissue（使用過的紙巾）

3. It takes more than_____for a plastic bag to degrade（降解）.

A. 5 years

B. 10 years

C. 50 years

4.A button battery（鈕扣式電池）can pollute（污染）____of water. That's the amount（總量）ofwater a person drinks in his/her whole life.

A. 200 tons（噸）

B. 400 tons

C. 600 tons

答案

A C C C