无法辨别A,C哪个正确,为什么C中BE ,WERE?

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

虚拟语气。

答案选A，C绝对不对。另外，请LZ学会搜索，CD里太多讨论了，为什么不搜索呢？

14. A is best. if the deal were是虚拟，必须用were,而不是was.

B. was错

C. by them中的them有点指代不清，如2楼所述是investors，还是one of the potential investors 和First Interstate Bank

另外最主要的：if the deal were从意思上看只是修饰penalties，而不是be signed, 所以这里用虚拟be signed似乎有问题。

D.was错，are错。

E.are错。