问题补充:
----What are you busy with?
---- The conference in our city next week.
A. held
B. to be held
C. be holding
D. will be held
答案:
A. held
(答案→)B. to be held
C. be holding
D. will be held
解析:句意:--你在忙什么?--在忙下周要举行的会议。这里是简略回答,只回答了The conference,它的后面是不定式作定语,因为下周举行,所以用不定式表将来,conference与hold之间是被动关系,故用不定式的被动式,故选B。