did
- When did you come back from Beijing?- _____the morning of April 18th.[ ]
- Did you study the English test?
- What did you do____your day off ?[ ]
- How much did you spend this new book? [ ]
- What did you do _______ your last school trip? [ ]
- When did the Shanghai Expo open?—_____ May lst, 2010.[ ]
- Did you find any English sitesthe Internet last night? [ ]
- When did he work_______the railroad? —From 1904 to 1909.[ ]
- When did it happen? — At 5:55 a.m._____ the morning of December 15. [ ]
- When did you get to know Sue?—______ Sep. 1st, 2005. [ ]