C.understand what other people are thinking

D.Know the moment and feel the time passing away

正确答案：live in the moment and know what happen around us.

10、Please listen to the video in the website on the issue of social media and then answer the following questions.According to what you have watched from the video， it is possible that social media is

A.welcomed by all the young kids

B.mostly welcomed by elder people

C.double-edged

D.disliked by young people

正确答案：double-edged

第二章单元测试

1、Please Listen to the following TED talk and answer the questions followed.（1分11秒-55秒）What happened when the speaker just built the instrument with his team to propose an experiment to fly to Venus？

A.He became involved in calculations of the greenhouse effect on earth and found that our atmospheric composition was changing

B.He was continuing his experiment on the trip to Venus

C.He has just resigned as principal investigator on the Venus experiment

D.He just joined NASA

正确答案：He became involved in calculations of the greenhouse effect on earth and found that our atmospheric composition was changing

2、Please Listen to the following TED talk and answer the questions followed.（1分55秒-2分17秒）

British physicist John Tyndall，in the 1850'；s，made laboratory measurementsof the infrared radiation，which is heat.And he showed that gasses such as CO2（），thus acting like a blanketwarming Earth'；s surface.

A.reflect sunlight

B.reflect heat

C.absorb heat

D.absorb sunlight

正确答案：absorb heat

3、Please Listen to the following TED talk and answer the questions followed.（2分17秒-3分08秒）The speaker worked with other scientists to analyze earth climate observations.In 1981，theypublished an article in Science magazineconcludingthat

A.All of these impactshave since either happenedor are now well under way

B.observed warmingof 0.4 degrees Celsiusin the prior centurywas consistent with the greenhouse effectof increasing CO2

C.That Earth would likely warm in the 1980'；s，and warming would exceedthe noise level of random weatherby the end of the century

D.The 21st centurywould see shifting climate zones，creation of drought-prone regionsin North America and Asia，erosion of ice sheets， rising sea levelsand opening of the fabled Northwest Passage

正确答案：All of these impactshave since either happenedor are now well under way