I really wanted to help those homeless children in the flooded areas, I donated all the pocket money that I had saved for months.
A. so
B. because
C. since
D. for
网友回答
(答案→)A. so
B. because
C. since
D. for
解析：考查连接词。句意“我真想帮助洪水灾害发生地区无家可归的孩子们，于是，我把握积攒了几个月的零花钱都捐了。”so“所以”；because“因为”；since“既然”，表示很明显的原因；for“因为”，表示补充说明。句意前后是因果关系。故选A。