---Jack, what do you usually do after supper?
---Well, I______ stay at home and watch TV, but now I ______ taking a walk.'A.used to, used toB.used to, am used toC.am used to, used toD.am used to, am used to
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B解析used to do sth 表示过去常常做某事，而be used to doing sth 表示的习惯于做某事，故选B