问题补充：
----I’m sorry. I’m late for the music presentation.
--- Why are you so late? The presentation for 10 minutes.
A. has begun
B. has stopped
C. has been over
D. has finished
答案：
A. has begun
B. has stopped
(答案→)C. has been over
D. has finished
解析：此题重点考查延续性动词和非延续性动词的区别。Finish，stop，begin等都是非延续性动词，不能和段时间状语连用，故选C.
