最新真题5

5.     The Immigration Service now has the discretionary power to keep families united even though all their members do not meet the five-year residency requirement.

(A) all their members do not meet the five-year residency requirement

(B) not all their members meet the five-year residency requirement

(C) all their members have not met the requirement for a five-year residency

(D) not all their members have resided for five years, a requirement

(E) all their members have not resided for five years, as required

答案是b，没有问题。

我的问题是ets不是习惯用一个单词作同位语指代前面的内容吗,那么d错在哪里？谢谢！