They say that the disease has___

They say that the disease has________ throughout the whole of western Africa.
A、sprung
B、spread
C、reached
D、covered
【正确答案】：B
【题目解析】：原句的意思是“他们说疾病蔓延到了整个西非”。因此我们选择B. spread（传播、蔓延）。