Bill a couch potato and now he has a healthy lifestyle.A. isB. used to beC. is used to be

问题补充：

Bill a couch potato and now he has a healthy lifestyle.

A. is

B. used to be

C. is used to being

D. is used to be

答案：

A. is

(答案→)B. used to be

C. is used to being

D. is used to be

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