140.        As the housing affordability gap widens, middle-income families are especially hard-hit, and these families can no longer qualify to buy homes, and rising rental rates force them to use far more than the standard 25 percent of their incomes for housing, leaving them with no equity or tax write-offs to offset the expenditures.

(A) and these families can no longer qualify to buy homes, and

(B) since these families can no longer afford to buy homes, furthermore

(C) for these families can no longer afford to buy homes, yet

(D) and these families can no longer afford to buy homes; however

(E) and these families can no longer afford to buy homes, for

KEY: C

我选的是B，请问这里哪里体现出来转折的关系要用yet啊？我觉得递进关系更明显。

请牛牛指教！

yet 前后是并列关系的啊,由于这两个因素导致MI FAMILY更困难,而且for表解

释原因

本来也不理解为什么要用yet,但读了几遍觉得逻辑上是有道理的,因为前面说的

是买房，既然买房不行，那就租房吧，而租房居然也不行。

这种题一般都根据词性来选择

但since表因为地时候可

不用完成时吧