1. Both, each, either, neither (只指两个)2. All, every, each, some, any, no (指两个以上)3. Some, any, more, (the) most, all, a lot, lots, enough, none (复数可数或不可数)4. Much, (a) little, a good/great deal, less, (the) least (不可数)eg. “Got any money?” “None at all.”
eg. “Does either side of this street get more sun that the other?” “No, neither side is sunnier than the other.”
真题剖析：
(1999) …The answers given by 200 women to those intimate open-ended questions made me realize that 51 was wrong could not be related to education in the way it was then believed to be. …
51. A. which
B. what
C. it
D. that
(1998) They learned to 51 their farming habits to the climate and soil. 52 they selected the fourth Thursday of November for their Thanksgiving 53 , they invited their neighbors, …
52. A. While
B. When
C. So
D. If
(1993) In the United States a commentator remarked that 45 Japan apparently still used some “primitive tools”, 46 a Japanese commentator expressed astonishment that the American pens wrote so poorly they could safely be used only once and then discarded.
46. A. though
B. when
C. while
D. and that
omitting the subject
Rather formal use