问题
选择题
Not until then ________ how important the brakes were.
A．I realized
B．do I realized
C．did I realize
D．I did realize
答案
答案：C
C [not until在句首，倒装语序。]
搜题请搜索小程序“爱下问搜题”
Not until then ________ how important the brakes were.
A．I realized
B．do I realized
C．did I realize
D．I did realize
答案：C
C [not until在句首，倒装语序。]