单选题
Not until
my mother told me
the sad news
last night
did I knew
that our neighbor Dr. Li
was killed
in a car accident the week before.
A. Not until
B. the sad news
C. did I knew
D. was killed
A
B
C
D
【正确答案】
C
【答案解析】
Not until引导的状语从句置于句首时，句子部分倒装。本题中助动词did提到主语之前后谓语动词要用原形know。
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