[单项选择]Our statistics show that we consume all that we are capable of producing.（　）
A. waste
B. buy
C. use
D. sell

[单项选择]Our statistics show that we consume all that we are capable of producing（　）.
A. waste
B. buy
C. use
D. sell

[单项选择]Much as we may pride ourselves on our taste, we are no longer free to choose the things we want because of advertising everywhere.
A. 尽管我们可以自夸自己的品位，但广告无处不在，我们已经无法独立自主地作出自己的选择了。
B. 正如我们可以自夸自己的品位一样，我们想不再自由地选择是因为无处不在的广告。
C. 当我们可以自夸自己的品位的时候，无处不在的广告已使我们不再自由地选择了。
D. 我们可以自夸自己的品味，但到处都是广告，我们不再自由地作出自己的选择了。

[判断题]Good books can decrease our contentment when we are happy and lessen our troubles when we are sad.

[填空题]Ladies and gentlemen,
Welcome to you all. We are pleased to have you here to visit our company, Today, we will first (11) you around our company, and then you will go and see our (12) and research center. The research center was (13) just a year ago. You may. ask any questions you have during the visit. We will (14) to make your visit comfortable and worth while.
Again, I would like to extend a warmest welcome to all of you on behalf of our company, and I hope that you will enjoy our stay here and (15) Ladies and gentlemen,
Welcome to you all. We are pleased to have you here to visit our company, Today, we will first (11) you around our company, and then you will go and see our (12) and research center. The research center was (13) just a year ago. You may. ask any questions you have during the visit. We will (14) to make your visit comfortable and worth while.
Again, I wo

[单项选择]

All we have a clock located inside our brains. Similar to your bedside alarm clock, your internal clock runs on a 24-hour cycle. This cycle, called a circadian rhythm, helps control when you wake, when you eat and when you sleep.
Somewhere around puberty, something happens in the timing of the biological clock. The clock pushes forward, so adolescents and teenagers are unable to fall asleep as early as they used to. When your mother tells you it’s time for bed, your body may be pushing you to stay up for several hours more. And the light coming from your computer screen or TV could be pushing you to stay up even later.
This shift is natural for teenagers. But staying up very late and sleeping late can get your body’s clock out of sync with the cycle of light and dark. It can also make it hard to get out of bed in the morning and may bring other problems, too. Teenagers are put in a kind of a gray cloud when they don’t get enough sleep, says Mary
A. Young children’s biological clock has the same rhythm with that of the teenagers.
B. People after puberty begin to go to bed earlier due to the change of the biological clock.
C. Children before puberty tend to fall asleep earlier at night than adolescents.
D. Teenagers go to bed later than they used to due to the light from the computer screen.