问题
选择题
16. I returned home with some roses and only then __________ find my favorite vase missing.
A．I did
B．did I
C．do I
D．I do
答案
答案：B
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16. I returned home with some roses and only then __________ find my favorite vase missing.
A．I did
B．did I
C．do I
D．I do
答案：B