[讨论]GWD 6-14 还是前后答案的不一致

Q14:

Not one of the potential investors is expected to make an offer to buy First Interstate Bank until a merger agreement is signed that includes a provision for penalties if the deal were not to be concluded.

1. is expected to make an offer to buy First Interstate Bank until a merger agreement is signed that includes a provision for penalties if the deal were
2. is expected to make an offer for buying First Interstate Bank until they sign a merger agreement including a provision for penalties if the deal was
3. is expected to make an offer to buy First Interstate Bank until a merger agreement be signed by them with a provision for penalties if the deal were
4. are expected to make an offer for buying First Interstate Bank until it signs a merger agreement with a provision for penalties included if the deal was
5. are expected to be making an offer to buy First Interstate Bank until they sign a merger agreement including a provision for penalties if the deal were

GWD的答案的可信度到底有多大，同样的题目前后两篇又不一致。

各位NN看看这道题！

对呀,也发现了，答案究竟是A还是C亚?

好像都有不对的地方：

如果是选A，结尾的that从句做agreement的同位语，没有紧跟着agreement。

如果是选C，是表示要用虚拟语气？用法对吗？

类似的还有一道题

涛涛GWD2-Q29 也是前后答案不一致，:

Several financial officers of the company spoke on condition that they not be named in the press reports.

A. that they not be named

B. that their names will not be used

C. that their names are not used

D. of not having their names

E. of not naming them

有选A，有选C的。

查询前面的讨论这道题的帖子，似乎认为on condition that/untill这类的都要用动词原形表虚拟语气……

希望牛牛们给个确切的说法亚！！