3. 不要一见到时间或地点名词就用where, when
a. I will never forget the days ______ I lived in the country.
b. I will never forget the days ______ I spent in the country.
A. that, that B. when, when C. that, when D. when, that
此题应选D。容易误选B。考生往往错误地认为, 时间或地点名词后的定语从句就一定要用关系副词when或where 来引导。注意在选择关系副词when 时, 考生要明确两个问题：一是先行词是否是指时间或地点的名词, 二是when, where在定语从句中是否用作状语。
a句中的定语从句主语和宾语齐全, 所以可用表时间的状语(when), 而b句中的定语从句, 显然 spent缺宾语, 所以选关系代词that。
考生从以上分析中应明确这样一点：选择关系词时一定要看它在定语从句中充当什么成分。尤其是当先行词为表时间或地点的名词时, 千万不要想当然地认为一定要用关系副词when和where来引导定语从句。再如：
1. a. This is the school ____ I studied last year.
b. This is the school ____ I visited last year.
A. that, that B. where, where
C. that, where D. where, that
2. a. I still remember the time ____ he was born.
b. I still remember the time ____ he told me.
A. that, that B. when, when
C. that, when D. when, that
答案：1. D 2. D (www.hxen.com)
4. that与which
a. Those are the very words ______ he used.
b. This is the question about ______ we’ve had so much discussion.
A. that, that B. which, which C. that, which D. which, that
此题应选C。关于先行词是指物的名词时, 其定语从句是用that还是用which来引导, 情况比较复杂：在通常情况下, 两者有时可换用；但有时只用which(主要是引导非限制性定语从句和直接放在介词后作宾语)；而有时则只用that 而不用which, 主要有以下情况：
1. 先行词是下列不定代词或受其修饰时 all, much, few, little, none, every(thing), any(thing), no(thing)等：
All [Everything] that can be done must be done. 凡能做的事都必须做。
2. 先行词有the very, the only, the same等修饰时：
This is the only example that I know. 我知道的例子只有这一个。
3. 先行词有最高级或序数词(包括last, next)等修饰时：
This is the best dictionary that I’ve ever used. 这是我用过的最好的词典。
4. 关系代词在定语从句中作表语时：
5. 先行词是一个既指人又指物的并列词组时：
We talked about the persons and things that most impressed us. 他们谈论了我们印象最深的人和事。