The police found that George had still another ____of income.
A.origin
B.source
C.basis
D.means
拓展
1、origin(事物的)起源;源头;起因，身世;出身
➢What was the origin of the quarrel?这场争吵的起因是什么?➢His origins were bumble.他出身低微。
2、source 源头，多用于隐喻指收入、情报、信息等来源➢Your local library will be a useful source of information.你们当地的图书馆就是很好的资料来源。
3、basis 基础，根据➢Trust is the only basis for a good working relationship.信任是建立良好工作关系的唯一基础。
4、means方式;方法;途径➢Television is an effective means of communication.电视是一种有效的通信手段。
解析
本题答案：B
翻译：警方发现他还有另一个收入"来源"。
