My son spend all his pocket money but now he saving some of it.A. was used to…used toB. u

问题补充：

My son spend all his pocket money, but now he saving some of it.

A. was used to…used to

B. used to…is used to

C. used to…used to

D. was used to…is used to

答案：

A. was used to…used to

(答案→)B. used to…is used to

C. used to…used to

D. was used to…is used to

解析：根据but now可知前文应为过去时态，used to可表示曾经做某事，be used to doing sth 习惯了做某事，故选B。