[問題]Test Code 55 SC 5

[usamiyo]

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 embers have not met the requirement for a five-year residency
D. not all their members haveresided for five years a requirement
E. all thier memvers ahve not resided for five years, as required

Ans: B

A跟B的答案要如何做區別呢? B指的是部份符合,部分不符合. A是指所有都不符合.就句意來說,要如何選出B答案呢? 還是只要看到類似的選項,選not all 對的機率比較高呢?