问题补充:
My grandfatherus stories when I was young.
A. was used to tell
B. is used to telling
C. used to tell
D. used to telling
答案:
A. was used to tell
B. is used to telling
(答案→)C. used to tell
D. used to telling
解析:be used to sth习惯于某事;used to do sth过去常常做某事.