根据所给的首字母提示，完成句子。
Peter is a famous writer now. But he was not a _g_____ student when he was young. He was often late for _c_____ and didn’t like doing his homework. Sometimes, he slept in class while the teacher was teaching. He didn’t understand much, __b____ he always thought he understood everything. One day the teacher _a____ the students a question, “ When Mike was ten years old, _h_____ brother Bob was twenty, Mike is fifteen now and how old is his brother Bob?” Peter said, “That’s easy. Bob is twice as old as Mike, so he is now  t  .”
Another time, the _t____ in a science class asked, “__W____ it thunders(打雷), why do we always see the light before we _h____ the sound?”
“ But Miss,” said Peter quickly, “Don’t you _k______ our eyes are in front our ears?”