—He wrote a lot of novels, none of __________ were popular.
—It’s the same with his wife. She wrote some plays, but none of __________ was a success.
A. these, them B. which, which C. those, which D. which, them
此题应选 D。很容易误选A，B。选对该题的关键是：要注意前面一句的 none of...没有并列连词(说明它才是非限制性定语从句，所以其后填which)，而后面一句的none of...前有一并列连词but(说明它与前面一句构成并列句，所以其后填them)。请做以下类似题(注意and, but等的有无)。如：
1. a. He has two sons, but neither of ________ is clever.
b. He has two sons, neither of ________ is clever.
A. them, them B. whom, whom
C. them, whom D. whom, them
2. a. Mr Smith made a lot of money, most of________ was spent helping the poor.
b. Mr Smith made a lot of money, and most of________ was spent helping the poor.
A. it, it B. which, which
C. it, which D. which, it
类似地，以下一题也与 but, and 这类词的有无相关：
3. ________many times, but he still couldn’t remember.
A. Having been told B. Being told
C. Having told D. He was told
答案：1. C 2. D 3. D