问题补充：
----- Will you do me a favor to have dinner with me at seven this evening?
----- I’m afraid I can’t. I a lecture at the meeting hall at the time.
A. will be giving
B. will give
C. give
D. am giving
答案：
(答案→)A. will be giving
B. will give
C. give
D. am giving
解析：“今晚七点能赏光和我一起吃饭吗？”“恐怕不行我那时正在做报告”题干给的时间是at seven this evening将来的时间，那么做报告是在将来的某个时间正在发生的事情所以用将来进行时，选A
