英语阅读理解,求原因!Ms Liu taught physics in a middle school.Last mon

英语阅读理解,求原因!Ms Liu taught physics in a middle school.Last month she explained to one of her classes about sound,and she decided to test them.She said to them,“Now,I have a brother in London.If I was calling him on the phone,and at the same time you were 75 feet way,listening to me from across the street,which of you would hear what I said first,my brother or you?Why?” The cleverest student answered at once,“Your brother,Ms Liu,because electricity（电）travels faster than sound waves（波）.” “That’s very good,” Ms Liu answered.But then one of the girls,Gao Hui,raised her hand and said,“I don’t think so.” “Your brother would hear you earlier because when it’s eleven o’clock here,it’s only eight o’clock in London.” 6.The class studied ___.A.reason B.sound C.waves D.electricity 7.Ms Liu asked the students ___.A.who would first hear what she said B.who was listening to her C.who was in London D.whose answer was right 8.Who would hear Ms Liu’s words first?A.Gao Hui.B.The students 75 feet away.C.They would hear the words at the same time.D.Her brother.9.The first student thought her brother heard the words first because ___.A.her brother lived near her home B.her brother lived far from her home C.he thought the electricity travels faster than the sound waves D.her brother’s telephone was good 10.Whose answer was right,the first student’s or Gao Hui’s?A.Gao Hui’s.B.The first student’s.C.Neither of theirs.D.Both of theirs.

6 B
7 A
8 D
9 C
10B
再问： 答案知道的，关键要具有极强说服力的原因，谢谢。
再答： 6 B----explained to one of her classes about sound教她的一个班组关于声音（的课程），故选B 7 A----which of you would hear what I said first老师问他们哪个人先听到她讲的话，故选A 8 D----我们自己分析谁先听到刘老师说的话，显然是她的兄弟，故选D 9 C----第一个学生认为是老师的兄弟先听到，原因是他认为电波传的比声波快，，故选C 10B----谁的回答是正确的，显然是第一个同学，而高慧认为我们这里11点时，伦敦才8点，所以伦敦那边先听到，显然是错的。故选B