问题
选择题
Why not ____ this kind of accident _____ again? [ ]
A. to prevent; happening
B. prevent; to happen
C. to prevent; happen
D. prevent; happening
答案
答案：D
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Why not ____ this kind of accident _____ again? [ ]
A. to prevent; happening
B. prevent; to happen
C. to prevent; happen
D. prevent; happening
答案：D