【题目】When this new kind of virus broke out at first in Mexico, no one had the least idea that it would _______ so rapidly throughout the world.
A. export B. spread C. expand D. deliver
在线课程【答案】B
【解析】
试题分析：A.export出口 B.spread传播 C.expand扩大 D.deliver递送 句意：当这种新型病毒第一次在墨西哥爆发的时候，没人会想到它会这么迅速传播到全世界。