21. --I hear that there was a terrible crash in the subway in Shanghai the other day.
--Yes, _____ news came as _____ shock to all of us.
A
the; the
B
a; /
C
the; a
D
/; a
the news 特指上文提到的crash事件；第二空为固定搭配 a shock to sb. 对某人来说很震惊；故选项C正确。
第一空特指上面提到的新闻，第二空为固定搭配。
对定冠词和不定冠词用法不熟悉致错。