Which is not the trouble the narrator met in the desert?
A. His car broke down.
B. There was no water in the radiator of the car.
C. The insects were beginning to cover the windows of his car.
D. He met a Bushmman.
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The Bushman stayed with me for the whole night because he _______________.
A. wanted to get my trust to help me out of trouble.
B. wanted to take away my belongings.
C. also had no home to go back.
D. wanted to see how I would solve my problem.
At first, the narrator didn't smile back to the Bushman because _______________.
A. he was not happy because of his broken car.
B. he was full of prejudices he had carried with him from his own culture.
C. he was a serious man who never smile to strangers.
D. he haven't seen the Bushman behind the bushes.
P148Lead-in[音频]Task 1. Listen to an adapted excerpt of Earth in the Balance by Al Gore. Which two factors have changed our relationship to the Earth in the 20th century according to the audio clip?
Listen to a brief introduction to global warming and decide whether the following statements are true(T) or false (F).( )1.Carbon dioxide traps heat in the atmosphere.( )2.Greenhouse gases have no benefit for human beings.( )3.Burning natural gas will not create carbon dioxide.( )4.The concentration of carbon dioxide in the atmosphere has increased by 13% during the industrial age.[音频]