參考答案：
翻譯
A happy home environment is one factor of success.

全文：
Conversation B
(Later, standing outside the center)
Pete: Why are we starting to recycle now?
Tess: Because Earth Day is April 22. The center is having a recycling campaign this month.
Zack: That’s a good idea.
Tess: And the city is having a contest for all the community centers. If we collect the most recycling, we’ll win $1,000!
Pete: Wow! Let’s try to win.
Tess: I want to. The center needs the money!

Conversation C
Tess: The red bin is for newspapers. The blue bin is for aluminum cans. And the green bin is for glass.
Zack: How much of each do you want to collect?
Tess: As much as we can! There is lots of trash! The U.S. makes 41 billion glass containers every year!
Pete: Wow.
Zack: Then collecting lots of glass will be easy!
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Key words
contest (n) 比賽
We’re having a cookie-eating contest. If you eat the most cookies, you win!

collect (n) 收集
Jennifer collects soda bottles. She has 400!

can (n) 罐；金屬容器
Tim drinks four cans of soda every day.

trash (n) 垃圾；廢物
Please put all that trash in the trash can.

billion (n) 10億
A billion is one thousand million.