2012ÄêÆÕͨ¸ßµÈѧУÕÐÉúÈ«¹úͳһ¿¼ÊÔÈ«¹ú¾í£¨Ó¢Ó
µÚÒ»½Ú µ¥ÏîÌî¿Õ (¹²15СÌ⣬ÿСÌâ1·Ö£¬Âú·Ö15·Ö)
´ÓA¡¢B¡¢c¡¢DËĸöÑ¡ÏîÖÐ.Ñ¡³ö¿ÉÒÔÌîÈë¿Õ°×´¦µÄ×î¼ÑÑ¡Ï²¢ÔÚ´ðÌ⿨ÉϽ«¸ÃÏîÍ¿ºÚ¡£
Àý£ºWe last night ,butwe went to the concert instead
A.must have studied B.might study
C.should have studied D.would study