完形填空 先通读下面的短文，掌握其大意，然后从下面四个答案中选择可以填入相应空白处的最佳答案。
John is a famous writer now. But he said he was not a        student when he was young. He was often late for      and didn’t like doing his homework. Sometimes , he slept in class while the teacher was teaching. He didn’t understand much,        he always thought he understand everything. One day the teacher        the student a question, “When Jack was ten years old,        brother Bob was twenty. Jack is fifteen now,     is his brother Bob?”
John said , “That’s easy, Bob is twice as old as Jack, so he is now thirty.”
Another time, the         in a science class asked, “During thunderstorms(雷雨),      do we always see the light before we          the sound?”
“But, miss,” said John quickly, “ don’t you        our eyes are in front of our ears?”

A．good B．tall C．rich D．fat

A．sleep B．lunch C．class D．play

A．so B．and C．or D．but

A．sent B．asked C．told D．found

A．you B．my C．his D．her

A．how many B．how old C．what D．who

A．teacher B．farm C．nurse D．policeman

A．what B．when C．where D．why

A．break B．make C．hear D．smell

A．read B．hope C．study D．know