托业填空：The event included a number of lectures and workshops that were __148__ to the public.

托业填空：The event included a number of lectures and workshops that were __148__ to the public.
Geneva,Switzerland—The International Association of Orthopedic Surgeons __147_ held its 5th annual convention at the European Center in Geneva.The weeklong convention was resounding success,bringing in medical practitioners and researchers from around the world.The event included a number of lectures and workshops that were __148__ to the public.
Bernd Wassal,president of the association,voiced his gratitude to the city at the event’s closing dinner,and he announced his plans to hold the meeting in Geneva again in two years.Next year’s __149__ will be held in Tokyo.
Questions 147-149 refer to the following article.
148.
A open
B opens
C opened
D opening
A
题目来源于托业网站英语个人模考测试.
个人认为应该C是正确答案,
对不起···当我把问题贴上来时,我自己马上就知道原因了.
因为OPEN在这里是做形容词用.
A是正确答案.
如果选C,则代表被动语态,不适合语境.
但是没有在百度上取消问题的功能.