.
—What are you busy with?
—The conference in our city next week, as you know.
A. held
B. will be held
C. be holding
D. to be held
网友回答
A. held
B. will be held
C. be holding
(答案→)D. to be held
解析：本题考查非谓语动词。句中The conference to be held in our city next week作问句答语I am busy with…的宾语。根据时间状语next week可知会议是即将举行的，故用不定式作定语，选D。