问题
选择题
— When did you finish _____ your homework?
— I finished it at 9:00 last night. [ ]
A. do
B. to do
C. did
D. doing
答案
答案：D
搜题请搜索小程序“爱下问搜题”
— When did you finish _____ your homework?
— I finished it at 9:00 last night. [ ]
A. do
B. to do
C. did
D. doing
答案：D
