gmat的语法题

题目

gmat的语法题
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.
A. 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
B. 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
C. 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
D. 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
E. 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 dea

答案

选C理由后面的if 既然用了were来虚拟所以前面也一定要用虚拟,省略should是GMAT的一个考点,因为简洁所以只用了be另外A里面的那个that includes太罗嗦了再说那个was,因为前面是一般现在时,时态要一直,所以was错到家了...