My grandfatherus stories when I was young.A. was used to tellB. used to tellingC. used to

问题补充：

My grandfatherus stories when I was young.

A. was used to tell

B. used to telling

C. used to tell

D. use to tell

答案：

A. was used to tell

B. used to telling

(答案→)C. used to tell

D. use to tell

解析：句意：我小时候，我爷爷经常给我们讲故事。Used to do sth.过去常常做某事，故选C。