通读下面短文，掌握其大意，然后从短文后面的括号内选出可以填入短文空格处的词。

问题：

通读下面短文，掌握其大意，然后从短文后面的括号内选出可以填入短文空格处的词。

     Peter is a famous writer now. But he was not a 1______ student when he was young. He was often late

for 2______ and didn't like doing his homework. Sometimes, he slept in class while the teacher was teaching.

He didn't understand much, 3______ he always thought he understood everything. One day the teacher 4______

the students a question, "When Mike was ten years old, 5______ brother Bob was twenty, Mike is fifteen now

and 6______ is his brother Bob?" Peter said, "That's easy. Bob is twice as old as Mike, so he is now thirty."

     Another time, the 7______ in a science class asked, "When it thunders (打雷), 8______ do we always see

the light before we 9______ the sound?"

     "But Miss," said Peter quickly, "Don't you 10______ our eyes are in front of our ears?"

(A. asked  B. why  C. class  D. but  E. his  F. good  G. teacher  H. know  I. how old  J. hear)