书名：寂天阅读满分2
版本：
页数：p.103 第151题(填空题组)
题目：
...Starting from opening time on Saturday,a promotional brochure for
the service ____ to everyone passing through the main entrance.
(A) is to be distributed
(B) is distributing
(C) was distributed
(D) would have distributed
疑问:答案是(A),但为什么(C)不行