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____.A. don’t B didn’t11. —Do you study art? ( )—________A. Yes, I do. B. No, I do. C. Yes, I don39。Mr Wang: Do you study ____17____?Bob: Yes, we ____18____.Mr Wang: What ____19____ do you like best?Bob: I ____20____ science best.Mr Wang: What ____21____ you, Jeff?Jeff: I like English best.A. subject B. about C. science D. do