1 This is the biggest lab____we have ever built in our university.A whichB whatC thatD where2 Is oxygen the only gas____helps fire burn?A thatB /C whichD what3 Air,____we breathe every day,is around us all the time.A that B /C whichD it4 It is the th

1 This is the biggest lab____we have ever built in our university.A whichB whatC thatD where2 Is oxygen the only gas____helps fire burn?A thatB /C whichD what3 Air,____we breathe every day,is around us all the time.A that B /C whichD it4 It is the th
1 This is the biggest lab____we have ever built in our university.
A which
B what
C that
D where
2 Is oxygen the only gas____helps fire burn?
A that
B /
C which
D what
3 Air,____we breathe every day,is around us all the time.
A that
B /
C which
D it
4 It is the third time____late this month.
A that you arrived
B when you arrived
C that you've arrived
D when you've arrived
5 we often think of the days____we spent together on the island.
A when
B which
C in which
D during which
6 Have you ever been to Shanghai,____I left ten years ago?
A where
B which
C that
D when
7 He has left Beijing,____a meeting is to be held.
A when
B where
C as
D which
8 This is the very place____I'm wishing to live in.
A where
B which
C that
D in which
9 Can you solve such problems____raised by the audience?
A what were
B as were
C that were
C which were
10 The reason____he didn't come was____he was injured.
A that,because
B why,that
C why,because
D that,that
11 He must be frome Africa,____can be seen from his skin.
A that
B as
C it
D what
12 His father died last year,____made it impossible for him to go abroad.
A when
B which
C as
D that
13____is natural,he married Mary.
A it
B what
C which
D As
14 All____is needed is a supply of oil.
A the thing
B that
C what
D which
15 He paid the boy 10 dollars for washing ten windows,most of____had not been cleaned for years.
A these
B those
C that
D which
16 she heard a terrible noise,____brought her heart into her mouth.
A it
B which
C this
D that
17 In the dark street,there wasn't a single person____she could turn for help.
A that
B who
C from whom
D to whom
18 The last river____they crossed is two miles wide.
A where
B which
C that
D in which

1 This is the biggest lab____we have ever built in our university.A whichB whatC thatD where2 Is oxygen the only gas____helps fire burn?A thatB /C whichD what3 Air,____we breathe every day,is around us all the time.A that B /C whichD it4 It is the th
CACCA ABBBB BBDBD BDC
1 This is the biggest lab____we have ever built in our university.
A which
B what
C that
D where
选C built缺少宾语,用which/that 主句中有最高级只能用that
2 Is oxygen the only gas____helps fire burn?
A that
B /
C which
D what
选A 从句中help缺少主语用which/that 主句中有the only只能用that
3 Air,____we breathe every day,is around us all the time.
A that
B /
C which
D it
选C 从句中breathe缺少宾语,这是非限制性定语从句不能that 所以选which
4 It is the third time____late this month.
A that you arrived
B when you arrived
C that you've arrived
D when you've arrived
选C 这个月你已经迟到了3次,因为是“迟到”这个动作已经完成了
从句中缺少主语
5 we often think of the days____we spent together on the island.
A when
B which
C in which
D during which
选A the days在从句中做宾语 用which
6 Have you ever been to Shanghai,____I left ten years ago?
A where
B which
C that
D when
选A
先行词在定语从句中作left的宾语,要选which
如果是作状语才能选B
7 He has left Beijing,____a meeting is to be held.
A when
B where
C as
D which
选B
Beijing 在从句中做地点状语 原句为He has left Beijing.In beijing a meeting is to be held.
8 This is the very place____I'm wishing to live in.
A where
B which
C that
D in which
选B place在从句中做live in的宾语
9 Can you solve such problems____raised by the audience?
A what were
B as were
C that were
C which were
选B 在定语从句中,如果先行词被such,the same等词所修饰的时候,定语从句的关系代词要用as来引导.
10 The reason____he didn't come was____he was injured.
A that,because
B why,that
C why,because
D that,that
选B The reason____he didn't come 是定语从句 the reason在从句中做原因状语用why引导 The reason was ____he was injured.是主语从句中的表语从句 从句不缺少成分用that引导
11 He must be frome Africa,____can be seen from his skin.
A that
B as
C it
D what
选B
as是定语从句,只不过先行词不是一个名词或者代词,而是一个句子
在非限制性定语从句中,which和as可以引导定语从句修饰整个句子,注意that,where,when,why等都不行.
12 His father died last year,____made it impossible for him to go abroad.
A when
B which
C as
D that
选B 从句中made缺少主语,这是非限制性定语从句不能that 所以选which
13____is natural,he married Mary.
A it
B what
C which
D As
选D He is natual.He married Mary.
14 All____is needed is a supply of oil.
A the thing
B that
C what
D which
选B all that=what 从句缺少主语
15 He paid the boy 10 dollars for washing ten windows,most of____had not been cleaned for years.
A these
B those
C that
D which
选D从句缺少主语 介词后面只能用which
16 she heard a terrible noise,____brought her heart into her mouth.
A it
B which
C this
D that
选B 从句中brought缺少主语,这是非限制性定语从句不能that 所以选which
17 In the dark street,there wasn't a single person____she could turn for help.
A that
B who
C from whom
D to whom
选D turn to sb for help 向某人寻求帮助
18 The last river____they crossed is two miles wide.
A where
B which
C that
D in which
选C.在定语从句中,如果先行词前面有形容词的最高级或序数词来修饰的话,只能用关系代词that,不能用which.
个人意见 应该是对的.

CACCB,BBCBB,BBDBD,BDC
不懂的具体再问吧，太多了，没时间一一解释，定语从句部分主要就是看先行词在从句里作状语还是主或者宾语，另外只能用that或者which的几个规则。我想老师应该有讲。自己动脑筋想想，这些答案应该都是正确的