问题

428.Inflation has made many Americans reevaluate their assumptions about the future; they still expect to live better than their parents have, but not so well as they once thought they could. (A) they still expect to live better than their parents have (B) they still expect to live better than their parents did (C) they still expect to live better than their parents had (D) still expecting to live better than their parents had (E) still expecting to live better than did their parents the key:B 比较考点：do的用法

Did带什么，expect or live？they still expect to live better than their parents 是不是也应该正确，有一道题就是因为前面有两个动词，所以后面什么助动词都没补，养牛那道。(E) associate with other calves, they require less medication and gain weight more quickly than the key:E