四级练习2011.06.22
[audio]http://sound.yywz123.com/tingbbs/cet4/cet420110622.mp3[/audio]Professor Wang is a physics teacher in Beijing. Once she was explaining to one of her classes about sound. (1)_________________________. "I have an uncle in Xinjiang," she said, "Suppose I was calling him on the phone from here and at the same time you were 25 metres away, listening to me. Who would hear me first, my uncle or you - and for what reason?" Ma Hua at once answered, "Your uncle, professor,(2)_____________________." "Good," said the professor, but then another boy raised his hand. "Yes, Li Ming?" said Professor Wang. "Of course your uncle would hear you first," Limin said, "but that's because of the time difference. (3)___________________________."
**** Hidden Message ***** hao 1)She decides to test the students to see how well they understand her
2)because sound ways travel slower than electricity
3)When it nine o'clock here,it's seven o'clock in Xinjiang 只听到最后一句，其他都只是一半一半 1.she decieded to test the students to see how well they have understood her
2.because sound travels slower than electricity
3.when it's nine o'clock yet it's seven o'clock in XinJiang
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