摘要：15．A．rocking B．reading C．talking D．selling(B) John is a famous writer now．But he said he was not a l6 student when he was young．He was often late for 17 and didn't like doing his homework．Sometimes.he slept in class while the teacher was teaching．He didn't understand much. 18 he always thought he understood everything．One day the teacher 19 the students a question.“When Jack was ten years old． 20 brother Bob was twenty．Jack is fifteen now and 21 is his brother Bob? John said. “That’s easy．Bob is twice as old as Jack.so he is now thirty． Another time.the 22 in a science class asked.“When it thunders. 23 do we always see the light before we 24 the sound? “But, Miss． said John quickly．“Don’t you 25 our eyes are in front of our ears?’’

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