请教大全650

1.        Since savings banks have to use short-term deposits to finance long-term fixed-rate mortgage loans, they sometimes lose money when there is a rise in short-term rates and, on the other hand, they are unable to raise the rates on their mortgages.

(A) when there is a rise in short-term rates and, on the other hand, they are unable to raise

(B) when short-term rates rise and they are unable to raise

(C) when a rise in short-term rates occurs and, correspondingly, there is no rise possible in

(D) with a rise in short-term rates, and they are unable to raise（B）

               (E) with short-term rates on the rise and no rise possible in

答案为什么是B呢？感觉这里应该有个转折，但是B却用了一个and。请牛牛指点。

up!

我也有这个疑惑, A为什么不对?

谢谢~!

谁来看看这道题

首先不存在转折，短期利率上升，损失；但如果短期利率下降，they are unable to raise the rates on their mortgages，逻辑上不同

(B) when short-term rates rise and they are unable to raise

when A and B 两个条件同时成立，则必然损失。

从并列的角度说不应该是c么，虽然确实麻烦了好多

D) with a rise in short-term rates, and they are unable to raise

D为什么不对？with不好么？