学进去

John is a famous(著名的) writer now. But he said that he was not a good 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(认为) he understood everything. One day the teacher _________ the students a question, “When Jack was ten years old, his brother Bob was twenty. Jack is fifteen now and _________ is his brother Bob?” John said, “That’s easy. Bob is twice(两倍) as old as Jack, so he is now _________.”