21.She is very dear to us. We have been prepared to do ________ it takes to save her life.
A. whichever B. however
C. whatever D. whoever
[解析]句意：她对我们非常珍贵。我们准备不惜一切代价挽救她的生命。whatever=anything that，连接宾语从句，兼作 takes 的宾语。
[答案]C
22.Could I speak to ________ is in charge of International Sales please?
A. who B. what
C. whoever D. whatever
[解析]句意：我可以同负责管理国际销售部的人通电话吗?句中 to 为介词，其后是名词性从句，而从句中缺少主语和关联词，故选C。
[答案]C
23.The howto book can be of help to ________ wants to do the job.
A. who B. whomever
C. no matter who D. whoever
[解析]句意：“howto”这本书对任何一个想做这份工作的人来说都有用。to 是介词，后接宾语从句，且从句中缺少主语。根据句子结构和意义，只能选 whoever(anyone who)，who 只指某一人，是特指。C项只引出让步状语从句。
[答案]D
24.At first he hated the new job but decided to give himself a few months to see ________ it got any better.
A. when B. how
C. why D. if
[解析]句意：起初他讨厌这份新工作，但他决定给自己几个月的时间看工作是否会变得更好。根据语境，D项 if(是否)符合题意。
[答案]D
25.A good friend of mine from ________ I was born showed up at my home right before I left for Beijing.
A. how B. whom
C. when D. which
[解析]句意：一个打我出生起就和我是好朋友的家伙，就在我前往北京之前来到了我家。from 为介词，后接宾语从句，from when I was born从我出生时。
[答案]C
26.As a new diplomat, he often thinks of______ he can react more appropriately on such occasions.
A. what B. which
C. that D. how
[解析]句意：作为新上任的外交官，他经常考虑如何在这样的场合做出更恰当的反应。根据句意，宾语从句缺少状语。故用 how。
[答案]D
27.Men usually go straight to ________ they want and leave quickly when shopping.
A. what B. which
C. where D. that
[解析]句意：男人在购物的时候，通常直接奔向他们所想要的东西，然后迅速离开。考查名词性从句。what 引导宾语从句，并作宾语从句中 want 的宾语，意为“所……的东西”。
[答案]A
28.—I wonder ________ you'll water this kind of flower.
—Every other day.
A. how often B. how long
C. how soon D. how much
[解析]句意：—我想知道你多长时间浇一回这种花。—隔一天一次。根据答语 every other day 可知，此处是询问频率的，故选A。
[答案]A
29.—Is there any possibility ________ you could pick me up at the airport?
—No problem.
A. when B. that
C. whether D. what
[解析]句意：—你可以到机场来接我吗?—没问题。that 引导同位语从句，说明 possibility 的内容。
[答案]B
30. We should consider the students' request ________ the school library provide more books on popular science.
A. that B. when
C. which D. where
[解析]句意：我们应当考虑学生们的要求，即学校图书馆应该多提供关于大众科学方面的书籍。名词 request 后的同位语从句句子结构完整，不缺任何成分，故用 that 引导。
[答案]A
31. The fact has worried many scientists______ the earth is becoming warmer and warmer these years.
A. what B. which
C. that D. though
[解析]句意：近年来全球气候不断变暖，这一事实使得很多科学家感到担忧。本题考查同位语从句。该题同位语从句结构完整，故选连词 that。
[答案]C
32.News came from the school office ________ Wang Lin had been admitted to Beijing University.
A. which B. what
C. that D. where
[解析]句意：学校办公室传出了王琳已经被北京大学录取的消息。这是一道考查同位语从句的题目，that 作为连词引导同位语从句，作 news 的同位语。
[答案]C
33.It is obvious to the students ________ they should get well prepared for their future.
A. as B. which
C. whether D. that
[解析]句意：显然，学生们应该为他们的未来做好充分的准备。that 引导主语从句，在从句中不作句子成分，it 是形式主语。as 引导定语从句或状语从句;which 引导名词性从句时意为“哪个(些)”;whether“是否”，此句中如用此词，则语义矛盾。
[答案]D
34.It is not immediately clear ________ the financial crisis will soon be over.
A. since B. what
C. when D. whether
[解析]句意：金融危机是否能很快结束不会立刻明朗的。因从句中有时间状语 soon，故排除C项。句中不缺少主语、表语，故排除B项。whether“是否”，为连词，引导真正主语从句，it 为形式主语。
[答案]D
