问题补充:
.
—What are you busy with?
—The conferencein our city next week, as you know.
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: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。