She_____her hairstyle in her hometown before she came to chongqing for a better job.
A had changed B changed C has changed D was changing
再答：由于change her hairstyle這一動(dòng)作早于came to Chongqing,故可以用過(guò)去完成時(shí)態(tài)(表示過(guò)去的過(guò)去).
關(guān)于過(guò)去完成構(gòu)成為：had +v.(p.p.)
1)表示先于過(guò)去即到過(guò)去某一時(shí)間為止已經(jīng)完成或結(jié)束的動(dòng)作或狀態(tài),表示“過(guò)去的過(guò)去”,只有和過(guò)去某時(shí)或動(dòng)作相比較時(shí)才可用,句中常用by,before或when等詞引導(dǎo)時(shí)間狀語(yǔ)從句或狀語(yǔ)從句.
如：By the end of last year we had built fire new buildings.
2)表示持續(xù)到過(guò)去某一時(shí)間的動(dòng)作或狀態(tài),句中常和for,since,until等短語(yǔ)或從句連用,如：It had snowed for a week by last Tuesday