题目内容：
There was a(n) （）change in the weather and many people fell sick.
A.abrupt
B.interrupt
C.permanent
D.impetuous
参考答案：
选择题：There was a(n) （）change in the weather and many people fell
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我对我的讨论贴回帖的准确性不能确定，那如何获得讨论贴主题的参考答案？
我对我的讨论贴回帖的准确性不能确定，那如何获得讨论贴主题的参考