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C D ( )3. — How does he usually go to school? — He ________ ride a bike, but now he ________ walking to lose his weight. A. used to。 used to B. was used to。 is used to C. used to。 is used to D. is used to。 used to ( )4. Mary, you ________ be short, but now you are tall. A. were B. are C. use to D. used to B C ( )5. Mother ________ us stories when we were young. A. is used to telling B. used to tell C. used to telling D. was used to tell ( )6. — She used to be a doctor, didn’t she? — ________. She used to be a teacher. A. Yes, she did B. Yes, she didn’t C. No, she didn’t D. No, she did ( )7. ________ play the piano? A. Did Tom used to B. Did