，this kind of disease can do great harm to people there.
A. Occurring where
B. It occurs where it is
C. Where does it occur
D. Wherever it occurs
网友回答
A. Occurring where
B. It occurs where it is
C. Where does it occur
(答案→)D. Wherever it occurs
解析：wherever引导让步状语从句。此时的wherever可用no matter where来替换。