Did you use to go to the same school as your brother?请问为什么是use to 而不是used to

Did you use to go to the same school as your brother?请问为什么是use to 而不是used to Did you use to go to sleep with the window _____ ?A onB openC closeD opened When did you go to What did you use to be like 英语翻译where did you use to live? When did you go to bed last summer,go,to,you,did,camp how did you go to school today Did you go to the Great Wall? I think you can go to did... DId you go to the park by What other places did you go to? Did you go to see the Did you go to school yesterday?是什么意思 Who did you go to the movie____? Did you go to Shanghai early or ... _____ you _____ to go to the park when they were children?[ ]A.Did,useB.Did,usedC.Do,used D.Do,use what did you use to do 的英语作文