What the doctor doubts is whether my mother will recover from the disease soon. 3、连接代词what,which,who,whom,whose除在句子中起连接作用外，还可在从句中从当主语、表语、定语，且各有各的词义。
Tom is no longer what he used to be. The question is which of us should come first. The problem is who is really fit for the hard job. The important thing is whose name should be put on the top of the list.
My strongest memory is when I attended an American wedding.
4. 连接副词where, when, why, how除在句中起连接作用外，在从句中还充当时间、地点、方式、原因状语，本身具有词义。
That’s where I can’t agree with you.
This is why Sara was late for the meeting. This is how they overcome the difficulties. My strongest memory is when I attended an American wedding. 5. 其他连词as if, because, as, as though 引导的表语从句
because引导表语从句通常只用于“This/That/It is because?”结构中。
as if/though引导的表语从句常置于连系动词look, seem, sound, be, become等后面，常用虚拟语气，表示不存在的动作或状态。
It sounds as if/though somebody was knocking at the door. My anger is because you haven’t written to me for a long time. 单项选择：
1. That’s ____ the Party called on us to do.
A. why B. what C. how D. that 2. The reason is ____ he is unable to operate the machine. A. because B. why C. that D. Whether 3. She looked____she were ten years younger. A.that B.like C.as D.as though 4. Jane is no longer ____ she was four years ago.
A. what B. which C. that D. when
5．_______your father wants to know is________ getting on with your studies. A. What; how are you B. That；how you are C. How；that you are D. What；how you are 6. The trouble is__________we are short of tools.
A. what B. that C. how D. why that 7. America was __________was first called “India” by Columbus.
6
A. what B. where C. the place D. there where 8. China is becoming stronger and stronger. It is no longer_________ . A. what it used to be B. what it was used to being C. what it used to being D. what it was used to be 9. ________he really means is ________he disagrees with us. A. What … that B. That … what C. What … what D. That … what 10. The energy is ________ makes the cells able to do their work. A. that B. which C. what D. such
综合练习：
1． — I flew to New York for the talk show on TV last week． — Is that ______you had a few days off?
A． why B． when C． what D． where 2． I ask her _____ come with me．
A． if she will B． if will she C． whether will she D． will she 3． It was a matter of _______ would take the position．
A． who B． whoever C． whom D． whomever 4． Can you tell me ________?
A． who is that gentleman is B． that gentleman is who C． who that gentleman is D． whom is that gentleman 5． Can you tell me ________ the railway station? A． how I can get to B． what can I get to C． where I can got to D． where can I get to
6． It is generally considered unwise to give a child ________ he or she wants． A． however B． whatever C． whichever D． whenever 7． Do you know ________ ?
A． what is his name B． how is his name C． what his name is D． how his name is 8． Go and get your coat． It's________ you left it．
A． there B． where C． there where D． where there 9． I wonder how much ________．
A． does the watch cost B． did the watch cost C． the watch costed D． the watch costs
7
10． It was _____ he said _____ disappointed me． A． what；that B． that；that C． what；what D． that；what
11． \．\
A． from what city does she come from B． from what city she come C． what city does she come from D． what city she comes from 12． Henry killed the dog． I'll ask him why ________． A． did he do that B． he did that C． he did D． he has done so
13． Have you seen Henry lately? My boss wants to know ________． A． how he is getting along B． how is he getting along C． what he is getting along D． what is he getting along 14． I am sure ________ he said is true．
A． that B． about that C． of that D． that what
15． You can’t imagine ________ when they received these nice Christmas presents． A． how they were excited B． how excited they were C． how excited were they D． they were how excited
16． Why the explosion occurred was ________ the laboratory attendant had been careless． A． for B． because C． since D． that 17． We gave him ________ help we could．
A． which B． what C． that D． this 18． Excuse me would you please tell me ________? A． when the sports meet is taken place B． when is the sports meet going to be held C． when is the sports meet to begin D． when the sports meet is to take place
19． This book will show you ________ can be used in other contexts． A． how you have observed B． how what you have observed C． that you have observed D． how that you have observed 20． Where do you think ________?
A． has he gone B． has he been C． he's gone D． was he
8