— Mike you’ve got so many beautiful stamps.— Yeah. I collect stamps when I was 8 years o

问题补充：

— Mike, you’ve got so many beautiful stamps.

— Yeah. I collect stamps when I was 8 years old.

A. was used to

B. used to

C. am used to

D. used

答案：

A. was used to

(答案→)B. used to

C. am used to

D. used

解析：考查短语：be used to do 被用来做某事，used to do 过去常常做某事，句意：迈克，你有如此许多美丽的邮票。是的，当我八岁的时候我过去经常收集邮票。所以选B。