单选题 "Since USAID began its first HIV/AIDS prevention efforts eight years ago, the epidemic has changed dramatically" this statement______.

A、 proves that the epidemic has been spreading very fast over the past eight years
B、 implies that the USAID was not very successful in the past eight years
C、 shows that the epidemic has spread too fast to be controlled over the past eight years
D、 explains that the epidemic has been controlled

【正确答案】 A

【答案解析】[考核题型] 单句释义题
[解析] 该句后句话讲到“在病毒蔓延的前十年中，艾滋病毒已遍布世界各个地区……”可见该句是对题干的进一步解释，因此答案为A。