公眾號：mywangxiao
及時發(fā)布考試資訊
分享考試技巧、復(fù)習(xí)經(jīng)驗
新浪微博 @wangxiaocn關(guān)注微博
聯(lián)系方式 400-18-8000
5. We carved their names on the stone so that younger generations could know what their forefathers ____ for the nation.
A. did B. were doing C. had done D. have been doing
答案及解析：C。
相關(guān)內(nèi)容：
（責(zé)任編輯：中大編輯）
