-do you often go swimming in the lake?-no,but i ____ A.used B.used to C.used to do D.was used

题目

-do you often go swimming in the lake?-no,but i ____ A.used B.used to C.used to do D.was used

答案

B,I used to代表以前做某某事.A在这里代表使用,C侧因为有"do"而使整个句子的语法崩裂了,D的意思是被用.