Mygrandfather      usstorieswhenIwasyoung.A.wasusedtot...

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