17.(06全国Ⅱ16)
-What did your parents think about your decision?
-They always let me do I think I should.
A.when B.that C.how D.what
答案 D
解析 what可以在宾语从句中作主语、宾语或表语。在本题中作动词do的宾语。
16.(06全国Ⅰ23)
See the flags on top of the building? That was we did this morning.
A.when B.which C.where D.what
解析 本题考查了表语从句的用法。由句中句子结构可知，此处缺一表语从句引导词，而且要在句中作did的宾语，故只有what符合要求。
15. (06四川30)
-It’s thirty years since we last met.
-But I still remember the story，believe it or not， we got lost on a rainy night.
A.which B.that C.what D.when
答案 B
解析 that引导同位语从句。which引导定语从句在从句中要作成分；when引导定语从句缺少表时间的先行词。
14. (06安徽29)
A warm thought suddenly came to me I might use the pocket money to buy some flowers for
my mother’s birthday.
A.if B.when C.that D.which
答案 C
解析 that引导同位语从句，解释a warm thought的具体内容。that只起连接作用，但不能省略。
13.(06山东27)
team wins on Saturday will go through to the national championships.
A.No matter what B.No matter which C.Whatever D.Whichever
解析 由句式结构可知此空白处应选择连词引导主语从句，且在主语从句中作team的定语使用，选项中只有whichever和whichever可同时具备这两种功能，且从数个已知的队中选择一个，故选whichever。
12.(06天津4)
What we used to think impossible now does seem possible.
A.is B.was C.has been D.will be
解析 由句意“我们以前认为不可能的事现在看起来的确是可能的”和谓语动词used to think可知空格处的
谓语部分应该表达过去意义。
11.(06北京29)
- Could you do me a favor?
- It depends on it is.
A.which B.whichever C.what D.whatever
解析 疑问词+ever引导让步状语从句或名词性从句，但句意为：要看帮什么忙了。所以whatever不合适。
10.(07山东24)
worries me the way he keeps changing his mind.
A.This B.That C.What D.It
解析 it在句中代指所发生的事情，the way在句中作方式状语，同时又作了先行词，其后为定语从句，省略了引导词that或in which。
9.(07山东22)
Could I speak to is in charge of International Sales，please?
A.anyone B.someone C.whoever D.no matter who
解析 whoever在句中引导名词性从句，作介词to的宾语，whoever在从句中作主语；no matter who只能引导让步状语从句。
8.(07江苏25)
Choosing the right dictionary depends on you want to use it for.
A.what B.why C.how D.whether
答案 A
解析 what引导的名词性从句作介词on的宾语， what在从句中又充当介词for的宾语，其他选项为副词或连
词，无此作用。