高考英语二轮复习专题四语法填空第三节无提示词类——并列连词和三大从句课件

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专题四 语法填空
第三节 无提示词类——并列连词和三大从句
考点一 并列连词
例1 （2025·全国二卷）
Nothing in my life before prepared me for this one—and to be
sure, the first time I came here I never imagined I would ever feel
comfortable in this area. But it's amazing how you can adapt _____
learn in a new environment.
and
思路点拨
第一步：判断考点。空前是动词原形adapt，空后是动词原形learn，
二者为并列成分，空处应用并列连词。
第二步：判断逻辑关系。结合设空句句意“令人惊讶的是，你可以
在新环境中适应和学习”可知，空前后为并列关系。
例2 （2023·全国乙卷）
...Beijing is also a place that welcomes the fast-paced
development of modern life, with 21st-century architectural wonders
standing side by side with historical buildings of the past.
It is a distinct visual contrast （反差） that shouldn't work,
_____ somehow these two very different worlds make a good
combination...
but
思路点拨
第一步：判断考点。空前是一个完整的句子，空后也是一个完整
的句子，二者为并列成分，空处应用并列连词。
第二步：判断逻辑关系。结合设空句句意“这种明显的视觉反差本
不该奏效，但不知为何这两个截然不同的世界却能完美融合”可知，空
前后为转折关系。
练
1. （经典高考）My bike was old and shaky _____ did the job. It
took us about 3 hours to go all the way around the Xi'an City Wall.
but
[解析] 考查连词。分析句子结构可知，空前的“was old and shaky”和
空后的“did the job”为并列成分；结合设空句句意“我的自行车很旧，
摇摇晃晃，但是还能起作用”可知，空前后为转折关系。故填but。
2. （经典高考）In the 18th and 19th centuries, wealthy people
travelled and collected plants, historical objects and works of art. They
kept their collection at home until it got too big ____ until they died,
and then it was given to a museum.
or
[解析] 考查连词。分析句子结构可知，空前空后都是until引导的时间
状语从句，因此，空处需要用连词。结合设空句句意“他们把收藏品留
在家里，直到藏品变得太多或者直到他们去世，然后藏品就被捐给了
博物馆”可知，空前空后形成了选择关系。故填or。
3. （2025·八省联考）Language is the carrier of communication, the
bridge of interaction between nations, _____ the bond of understanding
among civilizations.
and
[解析] 考查连词。分析句子结构可知，此处形成了3个“the+名词+of+
名词（短语）”结构的并列；结合句意“语言是交流的载体，是国家间
互动的桥梁，也是不同文明之间相互理解的纽带”可知，这三个结构为
并列关系。故填and。
4. （2025·江苏南通等苏北八市三模）Chinese artists don't usually
paint real places _____ imaginary, idealized landscapes.
but
[解析] 考查连词。此处为固定搭配not...but...，意为“不是……，而
是……”。故填but。
5. （2025·河南省实验中学四模）Incense （香） boasts a long history,
with its roots in many cultures—China, ancient Egypt, ancient
Babylonia and beyond. People from all walks of life benefit from its
countless qualities, whether they use it for pleasure ____ as medicine.
or
[解析] 考查连词。此处为固定搭配whether...or...，意为“是……还
是……”。故填or。
考点二 定语从句
（1）关系代词或关系副词引导的定语从句
关系词 所修饰的先行词 在从句中的功能
关系
代词 who 人 主语
whom 人 宾语
which 物或事 主语、宾语
that 人或物 主语、宾语、表语
as 人、物或事 主语、宾语
whose 人或物 定语
关系词 所修饰的先行词 在从句中的功能
关系
副词 when 表示时间的词 时间状语
where 表示处所或抽象地点的词 地点状语
why 表示原因的词 原因状语
（2）that、which和as的用法区别#2
只用that的
情况 先行词是all、few、little、much、something、anything、
nothing等不定代词
先行词被the only、the very、all等修饰时
先行词是序数词、形容词最高级或被序数词、形容词最高
级修饰时
先行词既有人又有物时
只用which
的情况 引导非限制性定语从句时
关系代词指物且位于介词后作宾语时
只用as的
情况 引导非限制性定语从句，从句可放在主句前、中、后，as
常译为“正如……，像……”
引导限制性定语从句，用于句式“such+名词+as...”或“the
same+名词+as...”
例1 （2025·全国二卷）
I was born and raised in Cleveland, Ohio in the United States.
Yet now, I live in the countryside of Zhejiang, China with my
Chinese husband and his family, _______ bamboo and tea bushes
（灌木） grow wild in the mountains, chickens are always free-range,
and central heating doesn't exist.
where
思路点拨
第一步：判断考点。设空处无提示词且空前后无连词；空前有逗
号，逗号后内容是对空前the countryside of Zhejiang的修饰。因此，空
处引导非限制性定语从句。
第二步：寻找先行词，判定属性。先行词为表示地点的名词短语
the countryside of Zhejiang。
第三步：判断从句所缺成分，确定关系词。从句中主谓结构完整，
关系词代替先行词在从句中作地点状语。
例2 （2024·浙江1月卷）
Of course, shops are not charities—they price goods in the way
___________ will make them the most money.
that/which
思路点拨
第一步：判断考点。设空处无提示词且空前后无连词；“空处+空
后内容”是对空前名词way的修饰；空前无逗号。因此，空处引导限制
性定语从句。
第二步：寻找先行词，判定属性。先行词为表示物的名词way。
第三步：判断从句所缺成分，确定关系词。从句中缺少主语。
练
1. （2024·新课标Ⅱ卷）Chinese cultural elements commemorating
（纪念） Tang Xianzu, _____ is known as “the Shakespeare of Asia,”
add an international character to Stratford-upon-Avon, William
Shakespeare's hometown.
who
[解析] 考查定语从句。分析句子结构可知，前两个逗号中间是一个完
整的句子且修饰Tang Xianzu，由此判断设空处引导非限制性定语从句。
先行词Tang Xianzu指人，从句缺少主语，故填who。
2. （2023·全国甲卷）“There was once a town in the heart of
America _______ all life seemed to enjoy peaceful co-existence with
its surroundings,” her fable begins, borrowing some familiar words
from many age-old fables.
where
[解析] 考查定语从句。分析句子结构可知，“空处+空后内容”是对空前
名词town的修饰，由此可判断空处引导限制性定语从句。先行词town
是一个地点名词，从句主系表结构完整，关系词在从句中作地点状语，
故填where。
3. （2023·全国乙卷）But for all its ancient buildings, Beijing is also
a place ___________ welcomes the fast-paced development of modern
life, with 21st-century architectural wonders standing side by side with
historical buildings of the past.
that/which
[解析] 考查定语从句。分析句子结构可知，“ ___ welcomes...life”是
对空前名词place的修饰，由此可以判断，空处引导限制性定语从句。
从句缺少主语，先行词place表示物，故填that或which。
4. （2025·辽宁沈阳二中等校联考）The return of the relics, _______
is among the highlights of Italian President Sergio Mattarella's six-day
state visit to China, also marks China's constant efforts to recover
cultural relics lost overseas.
which
[解析] 考查定语从句。分析句子结构可知，两个逗号中间是一个完整
的句子且修饰The return of the relics，因此，空处引导非限制性定语
从句，从句缺少主语，先行词The return of the relics表示事，故填
which。
5. （2025·湖南衡阳二模）Typically, traditional Chinese paintings are
brought to life on a length of silk or a sheet of paper, _______
surface is absorbent, allowing no room for erasure or correction.
whose
[解析] 考查定语从句。分析句子结构可知，“ ___ surface is
absorbent”是对空前a length of silk or a sheet of paper的修饰，结合
空前的逗号可以判断空处引导非限制性定语从句。关系词在从句中作
定语，修饰surface，故填whose。
考点三 名词性从句
名词性从句包括主语从句、宾语从句、表语从句和同位语从句。
例1 （2024·浙江1月卷）
If most of their customers are happy to buy larger quantities,
that's ______ they'll promote. But that leaves the solo （单独）
customers out of pocket and disappointed.
what
思路点拨
第一步：判断考点。分析句子结构可知，“____ they'll promote”跟
在系动词is之后，为表语从句。
第二步：判断引导词。从句的谓语动词promote后面缺少宾语，表
示物。
例2 （经典高考）
Going to Mount Huangshan reminds me of the popular Beatles'
song “The Long and Winding Road”. _______ is so breathtaking
about the experience is the out-of-this-world scenes.
What
思路点拨
第一步：判断考点。设空句中有两个is，且二者之间无连词，分析
可知，第二个is为主句谓语动词，其前为主语从句。
第二步：判断引导词。从句中缺少主语，结合主句表语“the out-
of-this-world scenes”可知，主语从句表示的是物。
练
1. （2023·新课标Ⅱ卷）They also need to be ready to give interviews
in English with international journalists. This is _____ they need an
English trainer.
why
[解析] 考查表语从句。分析句子结构可知，“____ they need an
English trainer”跟在系动词is后，作表语从句。从句主谓宾结构完整，
由此推测空处在从句中作状语。结合句意“他们还需要准备好用英语接
受国际记者的采访。这就是为什么他们需要一个英语培训师。”可知，
空处表原因。故填why。
2. （经典高考）The polar bear is found in the Arctic Circle and
some big land masses as far south as Newfoundland. While they are
rare north of 88°, there is evidence _____ they range all the way
across the Arctic, and as far south as James Bay in Canada.
that
[解析] 考查同位语从句。分析句子结构可知，空处跟在抽象名词
evidence之后，evidence后是对evidence内容的解释，由此可知空处引导
同位语从句。从句结构完整，不缺任何成分，故填that。
3. （2025·山东青岛二中二模）Math and literature are probably two
of the subjects that bring students headaches. However, scientists
wonder ___________ the beauty of math can be found in literary
works.
whether/if
[解析] 考查宾语从句。分析句子结构可知，wonder后的内容作动词
wonder的宾语，由此可知空处引导宾语从句。根据设空句句意“然而，
科学家们想知道数学之美能否在文学作品中被找到”可知，从句缺少的
意思是“是否”，故填whether或if。
4. （2025·河南郑州一中等校联考）It is said _____ such open-
spandrel arch bridges common in China at the end of the 6th century
didn't appear in Europe until the mid-19th century.
that
[解析] 考查主语从句。分析句子结构可知，It在句中作形式主语，空处
引导主语从句，作真正的主语。It is said that...为固定句型，意为“据
说……”。故填that。
5. （2025·吉林长春质检）“The purpose of architecture is to create a
beautiful, just and dignified living environment. People's real lives,
happiness and dignity are ______ we work for,” says Liu.
what
[解析] 考查表语从句。分析句子结构可知，系动词are之后是一个句子，
由此可知空处引导表语从句，表语从句缺少表示物的宾语，故填what。
考点四 状语从句
例 （经典高考）
__________ he asked the villagers on the banks of the river
where he could find the legendary （传奇的） artist, they smiled and
pointed down the river.
When/As
思路点拨
第一步：确定考点。设空处无提示词，逗号前面是一个完整的句
子，逗号后面也是一个完整的句子，二者之间没有连词，因此，空处
引导从句，从句起副词的作用，从而确定空处引导状语从句。
第二步：确定引导词。结合句意“当他问河边的村民他在哪里能找
到那位传奇画家时，村民们微笑着指了指河的下游”可知，空处引导时
间状语从句，asked和smiled and pointed几乎同步发生。
练
1. （2025·河北石家庄一模）“I hope no matter ______ people are
going through, the song will touch them,” said Fukuda.
what
[解析] 考查状语从句。分析句子结构可知，空处跟在no matter之后，
一起引导让步状语从句。结合引号中的句意“我希望无论人们正在经历
什么，这首歌都能触动他们”可知，空处需填what。
2. （2025·江苏泰州二模）It is believed that Chinese knotting, also
known as zhongguojie, originated for recording information and
exchanging messages _______ writing was invented.
before
[解析] 考查状语从句。分析句子结构可知，believed后是that引导的主
语从句，其中空前部分是完整句子，空后也是一个句子，空处需要一
个连词。结合句意“人们普遍认为中国结起源于文字发明之前，是用于
记录信息和交换信息的”可知，空处引导时间状语从句。空处的意思是
“在……之前”，故填before。
3. （2025·重庆南开中学质检）Their song “Big Dream” resonated with
audiences with music about a simpler, slower way of life, an
alternative to the intense competition of modern Chinese life,
________________ they faced criticism for romanticizing rural life.
though/although
[解析] 考查状语从句。分析句子结构可知，逗号前是一个完整的句子，
逗号后也是一个句子，空处需要一个连词。结合句意“尽管他们的歌曲
《伟大梦想》因美化农村生活而受到批评，但这首歌以展现一种更简
单、更缓慢的生活方式为主题，在中国现代化激烈竞争的社会环境下
为人们提供了另一种生活选择，引发了听众的共鸣”可知，空处引导让
步状语从句，表示“尽管”，位于句中，故填though或although。
强化训练
Ⅰ.单句语法填空
1. （2024·新课标Ⅱ卷）It was very exciting to hear the Chinese
language _____ see how Tang's play was being performed.
and
[解析] 考查连词。句意：听到中文并看到汤显祖的戏剧是如何被演绎
的，这非常令人兴奋。根据句意可知，“hear the Chinese language”与
“see how Tang's play was being performed”为并列关系，故填and。
2. （2024·浙江1月卷）Either your shopping is then too heavy to
carry home ____ you can't use what you've bought while it's still
fresh.
or
[解析] 考查连词。此处为固定结构either...or...，意为“要么……要
么……”，故填or。
3. （经典高考）The GPNP is intended to provide stronger protection
for all the species _____ live within the Giant Panda Range and
significantly improve the health of the ecosystem in the area.
that
[解析] 考查定语从句。空处无提示词且“____ live...Range”跟在名词
species之后，是对species的修饰，因此，空处引导定语从句。先行词
species指物，关系词在从句中作主语，且先行词前有all修饰，故只能
用关系代词that。
4. （经典高考）Because the moon's body blocks direct radio
communication with a probe, China first had to put a satellite in orbit
above the moon in a spot _______ it could send signals to the
spacecraft and to Earth.
where
[解析] 考查定语从句。空处无提示词且名词spot后的内容是对spot的修
饰，因此，空处引导定语从句。先行词spot是一个抽象地点名词，关系
词在从句中作地点状语，故填where。
5. （2025·广东汕头一模）Spending time in trees is _____ these
animals avoid enemies, such as snow leopards. Their reddish coats
and white face markings provide cover in the red-brown and white
trees where they live.
how
[解析] 考查表语从句。分析句子结构可知，系动词is之后为表语从句，
结合语境“在树上打发时间是这些动物躲避天敌的方式”可知，空处缺
少方式状语，故填how。
6. （2025·河南安阳一中等校联考）Users can customize their intake
based on their height, weight, and activity levels, ____ ask for
additional guidance from healthcare professionals.
or
[解析] 考查连词。分析句子结构可知，空后的ask和空前的can
customize为并列谓语，由此可知空处需用并列连词。结合句意“用户可
以根据自己的身高、体重和活动水平来订制摄入量，或者向医疗保健
专业人员寻求额外的指导”可知，空前后为选择关系，故填or。
7. （2025·山东淄博一模）After learning the real-person video
examples ___________ demonstrate each sign language word, users
can activate the camera, and the app will recognize and assess the
accuracy of their sign language gestures.
that/which
[解析] 考查定语从句。分析句子结构可知，空处引导一个限制性定语
从句，先行词是表示物的名词短语video examples，且从句中缺少主语，
故填that或which。
8. （2025·广东广州一模）Figuring out how to deal with new
challenges is part of ______ I enjoy. I'm not into repetitive exercises,
and climbing keeps things fresh with every new route.
what
[解析] 考查宾语从句。分析句子结构可知，空处跟在介词of之后，引
导宾语从句。从句缺少宾语，宾语表示“……的事物”，故填what。
9. （2025·山东济宁二模）Lyon's connection to silk dates back to
ancient times, ______ the city became a key gateway for Chinese silk
entering Europe.
when
[解析] 考查定语从句。空处无提示词且times后的句子是对times的修饰，
结合空前的逗号可知，空处引导定语从句。先行词是ancient times，关
系词在从句中作时间状语，故填when。
10. （2025·辽宁沈阳二中五模）“From a rocket engine designer to a
space flight engineer, my role has changed, _____ the initial spirit and
mission of serving the country in space remains the same,” Wang said
on Wednesday.
but
[解析] 考查连词。分析句子结构可知，空前空后都是完整的句子，空
处需用连词。结合句意“从火箭发动机设计师到航天工程师，我的角色
发生了变化，但最初的为国家服务的航天精神和使命始终未变”可知，
空前后为转折关系，故填but。
11. （2025·山东济宁二模）The recent announcement by China's
National Health Commission （NHC） _____ it would promote a
three-year “weight management” campaign has fueled nationwide
enthusiasm.
that
[解析] 考查同位语从句。句意：中国国家卫生健康委员会最近宣布将
推动为期三年的‘体重管理’运动，这激发了全国人民的热情。空后的“it
would promote a three-year ‘weight management’ campaign”是对
announcement具体内容的解释说明，由此可知空处引导同位语从句，从
句结构、意义完整，故填that。
12. （2025·江苏苏州中学等四校联考） _______________________ it
runs at a higher speed, the CR450 has braking efficiency similar to
trains running at 350 km/h.
Although/Though/While
[解析] 考查让步状语从句。逗号无法连接两个句子，因此，空处引导
从句。结合句意“尽管CR450以更快的速度行驶，但它的制动效率仍和
以350千米/时运行的火车相似”可知，空处引导让步状语从句，空处位
于句首，首字母需要大写，故填Although、Though或While。
13. （2025·湖南长沙市实验中学七调）The opening ceremony reached
its climax ______ four Chinese torchbearers lit the lilac-shaped
cauldron（“雪韵丁香”火炬塔） at the opening ceremony's sub-venue,
Harbin Ice and Snow World, the world's largest ice and snow theme
park.
when
[解析] 考查时间状语从句。空前后为两个完整的句子，考虑空处用连
词。结合句意“开幕式上，当四名中国火炬手在开幕式分会场——哈尔
滨冰雪大世界点燃‘雪韵丁香’火炬塔时，现场气氛达到了高潮……”可
知，空处引导时间状语从句，意为“当……的时候”，故填when。
14. （2025·陕西西安铁一中六模）The Chinese cherish family and the
strong bonds among family members, and extend this affection to the
community and the nation and beyond. That's _____ each Spring
Festival, millions of people start the journey home, creating the
greatest human migration on Earth.
why
[解析] 考查表语从句。分析句子结构可知，系动词is后是一个句子，
由此可知空处引导表语从句，结合句意“中国人重视家庭和家庭成员之
间的紧密关系，还会把这种情感延伸至社区、国家乃至更广阔的范围。
这就是为什么每逢春节，数百万人会踏上返乡之旅……”可知，此处表
原因，故填why。
Ⅱ.语篇练习
Passage 1
语篇类型：说明文 主题语境：人与自然
（2024·全国甲卷）
Although parks of all sizes and types exist at any level,the
national parks,in particular,tend 1._________（catch） our attention
because of their large size and variety. They are 2.__________
（treasure） of American heritage（遗产）. How did the national park
system come about
to catch
treasures
On a cool, starry night in mid-September 1870, four men relaxed
before a campfire along the Firehole River in 3.______ is now
northwestern Wyoming. They 4.______（be） part of a 15-member
exploring party that had spent almost five awesome weeks in witness
of the natural beauties there.
What should 5._________（do） with such a beautiful place
They wondered out loud. This area, with 6.____（it） unique and
breathtaking natural beauty, must be well preserved 7.____ all people
what
were
be done
its
for
of the nation to enjoy—as a national park. They all agreed and
vowed （承诺） to promote the idea at the 8.___________（complete）
of their journey. Their promotional work paid off. Two years later,18
years before Wyoming became a state, Yellowstone became the
firstnational park in the United States and the world. Yellowstone was
the 9._______（large） UnitedStates national park—2.2 million acres—
until Wrangell-Saint Elias in southern Alaska, 10._______ became a
national monument in 1978, took the honors as a national park in
1980 with 12.3 million acres.#1.1.3
completion
largest
which
1. _________
to catch
[解析] 考查非谓语动词。此处为固定搭配tend to do sth.，意为“往往
会做某事”。故填to catch。
2. __________
treasures
[解析] 考查名词复数。treasure在本句中表示“宝藏”，为可数名词，空
前无限定词，再结合前文They are可知，空处应用复数形式。故填
treasures。
3. ______
what
[解析] 考查宾语从句。分析句子结构可知，“____ is now...”位于介词
in后作其宾语，由此可知空处引导宾语从句，从句缺少主语，空处表示
“……的地方”，故填what。
4. ______
were
[解析] 考查动词的时态和主谓一致。根据语境可知，此处时间还是in
mid-September 1870，时态用一般过去时；主语They为复数，系动词用
复数形式。故填were。
5. _________
be done
[解析] 考查被动语态。句中What作主语，do与What构成被动关系，应
使用被动语态；should为情态动词，后接动词原形。故填be done。
6. ____
its
[解析] 考查代词。空处修饰名词beauty，应用形容词性物主代词。故
填its。
7. ____
for
[解析] 考查介词。此处表示供全国人民欣赏，for后接对象，表示“给，
供”。 故填for。
8. ___________
completion
[解析] 考查名词。空处跟在冠词the之后，且空后有of their journey修
饰，因此，空处应用名词。故填completion。
9. _______
largest
[解析] 考查形容词的比较等级。此处表示直到1980年为止，黄石公园
一直是美国最大的国家公园，large为形容词，空前有定冠词the，空处
需用形容词最高级作定语。故填largest。
10. _______
which
[解析] 考查定语从句。空处无提示词且“___ became...in 1978”修饰
Wrangell-Saint Elias，结合空前的逗号可知，空处引导非限制性定语从
句。先行词Wrangell-Saint Elias指物，关系词在从句中作主语，故填
which。
Passage 2
语篇类型：说明文 主题语境：人与自然
（2025·湖北宜昌一中等八校三模）
Three million years may seem like a long time. But when you
consider that the planet Earth is more than 4.5 billion years old, it is
a pretty short period of time.
The blue whale, 1._________（weigh） more than even the
biggest dinosaurs, is the largest animal 2._____ has ever lived.
weighing
that
They can grow to 30 meters long and be as heavy as 130,000
kilograms. But for millions of years, they were not nearly that large,
scientists said. “All of a sudden—‘boom’—we see 3.______（they）
get very big,” said scientist Nick Pyenson. He and other
4.____________（researcher） recently published an article on whale
size. “It's like going from whales the size of minivans （面包车） to
longer than two school buses,” Pyenson added.
them
researchers
The scientists believe 5.______ caused whales to get so large was
a change in the Earth's climate only about 3 million years ago. This
change led to food becoming more 6.______（easy） available. 7.____
oncoming ice age made the ocean water colder and brought more
nutrients, resulting 8.___ more food for large whales. Whales which
were able to quickly eat a lot of food survived, and got 9._______
（large）. “Over the next three or four million years, the blue whales
grew 10 times bigger than they 10.__________（be）,” the scientists
said.#1.1.3
what
easily
An
in
larger
had been
1. _________
weighing
[解析] 考查非谓语动词。分析句子结构可知，本句的谓语动词是is，
空处在句中作非谓语，句子主语The blue whale与weigh为主动关系，
需用现在分词作后置定语。故填weighing。
2. _____
that
[解析] 考查定语从句。空处无提示词且“空处+空后内容”修饰animal，
因此，空处引导限制性定语从句。先行词animal指物，关系词在从句中
作主语，且先行词前有形容词最高级修饰，故填that。
3. ______
them
[解析] 考查代词。空处作动词see的宾语，应用人称代词的宾格形式。
故填them。
4. ____________
researchers
[解析] 考查名词复数。researcher “研究人员”是可数名词，other后接不
可数名词或可数名词复数。故填researchers。
5. ______
what
[解析] 考查主语从句。分析句子可知，believe后是省略that的宾语从句，
该从句中“5 caused whales to get so large”位于was前作主语，由此可
知空处引导主语从句，从句缺少主语，指物，故填what。
6. ______
easily
[解析] 考查副词。空处修饰后面的形容词available，应用副词作状语。
故填easily。
7. ____
An
[解析] 考查冠词。分析句子结构可知,“7 oncoming ice age”在句中作
主语，中心词age为可数名词单数，此处泛指“一个即将到来的冰河时
代”，应用不定冠词；oncoming的发音以元音音素开头且空处位于句首，
首字母应大写。故填An。
8. ___
in
[解析] 考查介词。此处为固定短语result in，意为“导致”。故填in。
9. _______
larger
[解析] 考查形容词比较级。句意：那些能够迅速大量进食的鲸鱼存活
了下来，并且体型也变得更大了。根据句意并结合上下文语境可知此
处暗含比较，空处应用形容词比较级。故填larger。
10. __________
had been
[解析] 考查动词的时态。句意：在接下来的三四百万年里，蓝鲸的体
型比原来大了10倍。空处指的是动词grew之前的状态，表示过去的过
去，时态应用过去完成时。故填had been。