Mr. Brown go to bed early but now he going to bed earlyA. used to used toB. used to i

问题补充：

Mr. Brown go to bed early, but now he going to bed early．

A. used to, used to

B. used to, is used to

C. is used to, sued to

D. is used to, is used to

答案：

A. used to, used to

(答案→)B. used to, is used to

C. is used to, sued to

D. is used to, is used to

解析：used to do sth，表示过去常常做某事，而be used to doing sth，为习惯于做某事，故选B，符合题意。