题目内容：

根据短文内容及首字母提示，补全空格内单词，使短文完整、通顺。请在答题纸上写出完整单词。

The Earth is getting w1. because of the activities of people. We cut down and burn trees and send gases into the air with our cars and factories. Can we do anything about it? S2.. We may not be leaders or scientists but we can play our part in protecting the p3. . Here are two ideas.

Bike, ride to school

Do you g4. to school by bus or by bike? If you bike, you are doing s5.for the Earth. Buses, cars, trains and planes produce a lot of carbon dioxide（二氧化碳）. If you live near your school, why not bike there on warm spring mornings? Or, you can simply walk to school to s6. energy.

Wash in the green way

Do you help your mom, and dad wash clothes? Then wash them in an energy-saving way. A recent study by Cambridge University found that 60 p7. of the energy used on a piece of clothing is spent in washing and drying it. Over its lifetime, a T-shirt can send up to 4 kilograms of carbon dioxide into the a8. . If you wash your own clothes, wash them in cold or warm water to save energy, but not hot water. Wash your clothes when they fill up the m 9. . Use the most energy-saving machine you can find. Some new ones use as little as one-fourth of the energy of older machines. When they’re clean, dry your clothes in a n10. way by hanging them on a line rather than putting them in a dryer. In all, you can cut the carbon dioxide used in washing by 90 percent.