请选择DCBA5t1H)i6M4|+s'l7z;z0D'KWhat ________you do ________vacation last summer ?:}+u6z.R-{'H6q5U'A2S.T
A. do , for:}+u6z.R-{'H6q5U'A2S.T
B. did , in:}+u6z.R-{'H6q5U'A2S.T
C. do , on:}+u6z.R-{'H6q5U'A2S.T
D. did , on:}+u6z.R-{'H6q5U'A2S.T