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
在過去數(shù)年中,越來(lái)越多的20和30歲的美國(guó)人被中國(guó)快速增長(zhǎng)的經(jīng)濟(jì)所吸引,來(lái)到這里就業(yè).
由開頭In the last few years,可知這是一個(gè)從過去開始一直發(fā)生并且持續(xù)到現(xiàn)在的動(dòng)作,可以確定是現(xiàn)在完成時(shí)態(tài).下一步,這個(gè)動(dòng)作發(fā)生到現(xiàn)在,并且還會(huì)繼續(xù)發(fā)生下去,故應(yīng)用現(xiàn)在完成進(jìn)行時(shí)態(tài)（從過去某時(shí)開始一直持續(xù)到現(xiàn)在的動(dòng)作,并且還將持續(xù)下去）.
【英語(yǔ)牛人團(tuán)】?jī)A情奉獻(xiàn),head此處是什么意思？head 在這里是不及物動(dòng)詞vi, 【朝。。前進(jìn)】，head for 朝 ... 去