explained to one of her classes about sound,and she decided to testthem to see how successful she had been in her explanation. She said to them,“Now I have a brother in Los Angeles. If I was calling him on the phone and atthe same time you were 75 feet (英寸) away, listening to me fromacross the street, which of you would hear what I said earlier, my brother oryou and for what reason?”<p align="left"> Tom at once answered, “Yourbrother. Because electricity travels faster than sound waves.” “That’s everygood, ” Miss Gorgers answered; but then one of the girls raised her hand, andMiss Gorgers said. “Yes, Kate.” “I disagree,” Kate said. “Your brother wouldhear you earlier because when it’s 11 o’clock here it’s only 8 o’clock in LosAngeles.”( ) 61.Miss Gorgers wasteaching her class_________.<p align="left"> A. how to telephone B. about electricityC. about time zone(时区) D. about sound<p align="left">( ) 62.Miss Gorgers raised thisquestion because she wanted to know whether______.<p align="left">A. it was easy to phone to Los AngelesB. her student could hear her from 75feet awayC. her students had understood herlessonD. sound waves were slower thanelectricity<p align="left">( ) 63.Tom thought thatelectricity was _________.<p align="left">A. slower than soundwavesB. faster than sound wavesC. not so fast as soundwavesD. as fast as sound waves<p align="left">( ) 64.Kate thought Tom waswrong because _______.<p align="left">A. clocks in Los Angelesshowed a different time from those in New YorkB. electricity was slowerthan sound wavesC. Tom was not good atphysics at allD. Tom’s answer had nothingto do with sound waves