My grandfather us stories when I was young．
4.
A. was used to tell
B. is used to telling
C. are used to tell
D. was used to telling
网友回答
A. was used to tell
B. is used to telling
C. are used to tell
(答案→)D. was used to telling
解析：考查固定短语。当我小的时候，我的爷爷习惯于给我们讲故事。习惯于做某事用be used to doing sth.故选D。