按杀虫剂的化学成分分类，杀虫剂可以分为（）。
A、1类
B、2类
C、3类
D、3类以上
参考答案：D
The adoption of orphans and physically challenged children has been a subject of public
debate _____ a fire in an unregistered orphanage last month.
A．according to
B．in case of
C．ever since
D．such as
宗教帮会用语
