另外几道补充材料的疑题

littlebluesk

101,
Several senior officals spoke to the press on condition (that they not be named) in the story.
c:that their names are not used
为什么不选c而选a呢？

103，
One of Ronald Reagan's first acts as President was to rescind President Carter's directive that any chemical banned on medical grounds in the united states be prohibited from sale to other countries.)
c: prohibiting the sale to other contries of any chemical banned on medical grounds in the United States.

选c,可是A为什么不对呢？

108 With its plan to develop seven and a half acres of shore land, Cleveland is but one of a large number of communities on the Great Lakes that (is looking to its waterfront as a way to improve the quality of urban life and attract) new businesses.

c: are looking to their waterfront as a way to improve the quality of urban life and attract new businesses and attract

答案选c ，但我认为应该选a ：but one 不是only one 的意思吗？后边定语从句不应该用单数么？

需要指点！！！！

jubel

101,虚拟语气，只能用be
103, prohibit sth / prohibit A from doing
108,
one of a large number of communities 再加 that 就是修饰 of 后面的名词了