I used to go to school (on foot)对括号部分提问 ____ _____ _____ _______go to school?

题目

I used to go to school (on foot)对括号部分提问 ____ _____ _____ _______go to school?
I used to go to school (on foot)对括号部分提问
____ _____ _____ _______go to school?

答案

填How did you often
used to do sth 表示过去常常做某事,可以用一个词often 代替,时态用一般过去时.