题目内容

Listen to Part 3 of Listening 2 and complete the following paragraphs.Avoid (1) __________ purchases. We throw too much away and still re-cycle too little. Large amounts of energy and (2) __________ go into disposing of endless amounts of “stuff”, much of (3) ___________ we don’t really need. Avoid the temptation to buy useless things.Telecommute. Do you really need to (4) __________ your way through traffic each and every day, or just to sit at your office desk and work on your computer? Do you need to fly to a (5) __________ in another city in order to talk to your colleagues? Or can you make best use of the (6) __________ of the Internet to do some of this remotely? Telecommuting can be an (7) __________ way of doing “paperwork” in your home office and more and more (8) __________ are seeing the benefits of this and loving the concept.

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地球霸主恐龙是何时灭绝的?

A. 三叠纪
B. 侏罗纪
C. 白垩纪
D. 第四纪

以下哪些因素可能造成生物灭绝?

A. 火山喷发
B. 行星撞击地球
C. 全球变暖或变冷
D. 以上全是

地球已经诞生了约46亿年,自5.4亿年前显生宙时期以来,地球共经历了五次大规模的灭绝。

A. 对
B. 错

人类生活的地质时期是显生宙新生代第四纪中的全新世。

A. 对
B. 错

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