问题
选择题
Not until the stadium of Bird’s nest was completed in the end ____back to their normal position.
A．did our hearts got
B．did our hearts get
C．our hearts went
D．our hearts did get
答案
答案：B
考查倒装。Not until放在句首时，主句要部分倒装，所以选B。A项错误是因为助动词did之后要用动词原形。