问题补充：
23. — Let’s discuss the question raised last night, shall we?
— There is no hurry for that. Ifor a conference.
A. headed
B. was heading
C. am heading
D. have headed
答案：
A. headed
B. was heading
(答案→)C. am heading
D. have headed
解析：可联系答.案.网客服索取。
