问题补充：
My brother used to , but now he is helpful to others.
A. get trouble
B. get into trouble
C. getting into trouble
D. getting trouble
答案：
A. get trouble
(答案→)B. get into trouble
C. getting into trouble
D. getting trouble
解析：句意：我哥哥曾经陷入困境,但现在他帮助别人。固定短语get into trouble陷入困境。1.used to do sth. 过去常常做某事,(意思现在不做了) 2.be used to doing sth / be used to sth . 是指习惯于做某事.(这里的to 是介词.) 3.be used to do sth. 被用来做某事.结合语境可知选B。.
