求助GWD1-3

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,A?

Q1:

The Acoma and Hopi are probably the two oldest surviving Pueblo communities, both dating back at least a thousand years.

A  both dating

B  both of which have dated

C  and each has dated

D  and each one dating

E  each one of which date

   Answer: A

为什么不选C呢？

1.a

2.语法都对的情况下分词结构比从句好

明白了，谢谢。