造成野生动物濒危灭绝的主要原因是（）
A.同种生物的斗争
B.天敌过多
C.外来物种入侵
D.生存环境的破坏与改变
参考答案：D
The letter is______ in French. I cannot read it. [ ]
A. writing
B. written
C. wrote
D. writes
过氧化苯甲酰及苯甲酰氯
