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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?”