17.________

　　takes fuel. Most of the cow won’t even be used for meat people eat. By the time a hamburger finally lands to a dinner plate,

　　18.________

　　has made bad effect on the environment.

　　We can reduce the production of global warming gases by eating less beef. Other kinds of meat like pork and chicken do

　　19.________

　　harm to the environment—at least in terms of the amount of greenhouse gases released. 20.________ , all kinds of meat are harder

　　21.________

　　the planet than vegetables.

　　22.________

　　changing our diet to less meat and more vegetables, as it turns

　　23.________， may do the world some good.

　　Ⅲ.阅读理解

　　Our Community

　　One Tuesday evening in the beginning of the fall 1996 semester (学期) at Shippensburg University, sirens sounded. These sirens were not in celebration; they were a cry to the university that something was wrong. A house, only one block away, was on fire. Nine of the university’s students lived there.

　　From the minute the word got out that help was needed, it seemed like everyone showed up. The victims (受灾者) of the fire were offered endless invitations for housing for the night. The very next day, everyone got_into_gear to do their part in helping them. Flyers(＝ handbills) were posted with items that were immediately needed, just to get these students through this next couple of days. Boxes for donations (捐赠品) and money jars were placed in every residence hall (学生宿舍)．

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