单选题
Not until
my mother told me
the sad news
last night
I knew
that our neighbor
was killed
in a car accident the week before.
A. Not until
B. the sad news
C. I knew
D. was killed
A
B
C
D
【正确答案】
C
【答案解析】
应改为did I know。将not until提到句首时，主句要用部分倒装结构，正如此题。
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