－What are you busy with ?－The conference in our city next week. A. heldB. will be heldC.

问题补充：

－What are you busy with ?

－The conference in our city next week.

A. held

B. will be held

C. be holding

D. to be held

答案：

A. held

B. will be held

C. be holding

(答案→)D. to be held

解析：考查不定式的被动做定语，句意是：--你在忙什麽？--下周要举行的会议。说明这里填的是定语，因为是将要被举行，用不定式的被动式。选D。