高中英语短文改错Miss Evans taught physics in school in London．Last m

高中英语短文改错
Miss Evans taught physics in school in London．Last month 76．___________
she was explaining to one of her class about sound ,and 77．___________
she decide to test them to see how successful she had 78．___________
been in her work． She said to them,“Now I has a sister 79．___________
in Washington． If I was calling her by the phone,and 80．___________
you were on the other side of the street． Who would 81．___________
hear me first,my sister and you?And why?” 82．___________
A clever boy at once answered,“You sister,Miss 83．___________
Evans,because electricity traveled much faster than sound 84．___________
waves．” “Very well,” Miss Evans praised． 85．___________