This young tree could not have been damaged accident; I believe it was done purpose.
A. by; on
B. for; with
C. by; with
D. for; on
网友回答
(答案→)A. by; on
B. for; with
C. by; with
D. for; on
解析：考查短语：by accident 偶然地，无意地，on purpose 故意的，句意：这可小树不可能是偶然被毁坏的，我认为它是被故意毁坏的。所以选A。