这个题目答案究竟是A还是C啊？

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

这个题目第一次我选A答案是C第二次碰到我选C答案是A

i think A is better. there is no reason to use the "be" in C.

looking forward to discussion.

我觉得是C，用be是虚拟语气"should be"省略了"should"，而且后面的"if the deal were"条件从句用的也是虚拟语气，这更说明其主句也应用虚拟语气。

支持4楼的观点

似乎在哪里见过这道题