这道题答案是C 

'were'的主语不是'the deal'吗 为什么要用复数

请帮我看看 先谢谢啦！

Q3:

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

   Answer:

C明显不对啊

until a merger agreement be signed 

为什么用be呢

then which is correct answer?

if the deal were not to be concluded. 好像是一种虚拟语气用法，代表一种意愿，意向， 曾见SC例题如下：

If he were to be in the wall street, I would have recommand J.P.Morgan