This is one of the most interesting questions that ____ asked.
A. haveãããã B. hasãããããã C. have beenãããããD. has been
ãçæ¡ãD
ã解æã
questionåªè½è¢«askï¼ æ
åºè¯¥ç¨è¢«å¨å½¢å¼ï¼æé¤AB
å
¶æ¬¡ï¼one of+
åè¯å¤æ°ï¼åé¢åå¤æ°åºè§oneèå®ï¼
å³ç¨åæ°ï¼ç»åæ¬é¢åºç¨has
综ä¸ï¼æ¬é¢çæ¡æ¯has beenï¼çæ¡Dæ£ç¡®