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

相關內容：

2012年4月公共英語考試每日一練匯總

（責任編輯：中大編輯）

共2頁,當前第1頁  第一頁  前一頁  下一頁