单选题
The announcement ______ greatly distressed the waiting passengers.
A、
that all flights were cancelled
B、
why all flights were cancelled
C、
which all flights were cancelled
D、
of which all flights were cancelled
【正确答案】
A
【答案解析】
[解析] 本题考查同位语从句。本题已有的成分句子结构已很完整，缺少的部分可以是定语从句或同位语从句。“航班被取消”是宣布的具体内容，是对announcement的具体说明，故选A。
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