单选题
Add to this the information and Internet revolutions, and you have a series of historical changes that have produced a single global system, far more integrated and faster-moving than ever before.
【正确答案】
A
【答案解析】[解析] 很明显far more integrated and faster-moving than ever before是缺少一定成分的,因为该句的整个主语是you,这里既缺主语,又缺谓语。这里的修改方式可以是去掉前面的逗号,然后再加上which is,使得far more integrated and faster-moving than ever before成为global system的定语从句。