Mygrandfather      usstorieswhenIwasyoung.A.wasusedtote...

問題詳情：

My grandfather       us stories when I was young.

A. was used to tell       B. is used to telling 

C. used to tell           D. used to telling

【回答】

 C 

知識點：動詞和動詞短語

題型：選擇題