In the last few years,a growing number of Americans in their 20s and 30s __ for China for employment, attracted by its f
问题描述：
In the last few years,a growing number of Americans in their 20s and 30s __ for China for employment, attracted by its faster-growing economy.
A.headedB.are heading
C.have been headingD.had headed
答案选C,我想问这句话是什么意思?
答
In the last few years,a growing number of Americans in their 20s and 30s __ for China for employment,attracted by its faster-growing economy.
A.headed B.are heading
C.have been heading D.had headed
在过去数年中,越来越多的20和30岁的美国人被中国快速增长的经济所吸引,来到这里就业.
由开头In the last few years,可知这是一个从过去开始一直发生并且持续到现在的动作,可以确定是现在完成时态.下一步,这个动作发生到现在,并且还会继续发生下去,故应用现在完成进行时态（从过去某时开始一直持续到现在的动作,并且还将持续下去）.
【英语牛人团】倾情奉献,head此处是什么意思？head 在这里是不及物动词vi, 【朝。。前进】，head for 朝 ... 去