一、单项选择
1.
With
the
widespread
use
of
the
Internet,
communications
across
the
world
have
_____________developed
over
the
years.
A．steadily
B．differently
C．independently
D．formally
【答案】A
【解析】考查副词辨析。句意：随着互联网的广泛使用，世界各地的通信多年来稳步发展。A.
steadily稳定地；B.
differently不同地；C.
independently独立地；D.
formally正式地。此处指稳步发展，故选A。
2．According
to
Professor
Johnson,
we
don’t
have
to
read
the
book
if
we
don’t
want
to,
as
it
is
______.
A．worthwhile
B．necessary
C．optional
D．serious
【答案】C
【解析】考查形容词词义辨析。句意:根据约翰逊教授的说法，如果我们不想读这本书，就不必读，因为它是可选择的。A.
worthwhile值得的；B.
necessary必要的；C.
optional
可选择的，选修的；D.
serious严肃的，认真的。根据“we
don’t
have
to
read
the
book
if
we
don’t
want
to”可知，这本书读不读都可以，由此可知，它是“可选择的”。故选C。
3．A
dog’s
eating
habit
requires
regular
training
before
it
is
________
established.
A．properly
B．widely
C．originally
D．temporarily
【答案】A
【解析】考查副词辨析。句意：在狗的饮食习惯被正确地建立之前，需要定期的训练。A.
properly正确地；B.
widely广泛地；C.
originally最初；D.
temporarily临时地。狗的饮食习惯不可能是被“广泛地、最初地、临时地”建立，故选A。
4．The
outbreak
of
Covid-19
has
meant
an
_____
change
in
our
life
and
work.
A．absurd
B．abrupt
C．allergic
D．authentic
【答案】B
【解析】考查形容词词义辨析。句意:新冠肺炎疫情的爆发，给我们的生活和工作带来了一个突然的变化。A.
absurd荒谬的；B.
abrupt突然的；C.
allergic过敏的；D.
authentic真实的。根据常识可知，新冠肺炎疫情给我们的生活和工作带来了一个突然的变化。故选B。
二、语法填空
5.
On
our
way
to
the
house,
it
was
raining
_______
hard
that
we
couldn’t
help
wondering
how
long
it
would
take
to
get
there.
【答案】so
【解析】考查副词。句意：在我们回家的时候，雨下得太大了，以至于我们不由怀疑能否抵达。用副词修饰形容词so,
so…that…太……以至于…。
6.
After
our
plane
landed,
we
went
to
the
hotel.
We
had
made
our
reservation
six
months________
(early),
but
the
man
at
the
front
desk
said
there
had
been
a
mistake.
【答案】earlier
【解析】考查比较级。由had
made可知该动作发生在到达旅馆之前，故应该是早在六个月之前我们就已经预订了，故填比较级earlier。
7.
In
the
18th
and
19th
centuries,
(wealth)
people
travelled
and
collected
plants,
historical
objects
and
works
of
art.
【答案】wealthy
【解析】考查形容词。句意:在18和19世纪，富人旅行并收集植物、历史物品和艺术品。此处修饰名词people，应使用形容词，做定语。故填wealthy。
8.
Farming
produced
more
food
per
person
hunting
and
gathering，so
people
were
able
to
raise
more
children.
【答案】than
【解析】考查比较级。句意：农业比狩猎和采集的人均粮食产量更高。结合句意可知，此句中将农业生产与狩猎和采集相比，应用比较连词than。more…
than，意为“比……更”故填than。
一、单项选择
1．The
old
teacher,
who
is
almost
sixty,
is
always
_____
and
that
is
to
say,
he
works
always
in
high
spirits.
A．patient
B．relaxed
C．intelligent
D．energetic
【答案】D
【解析】
考查形容词辨析。句意：这位老教师，差不多有60岁了，总是精力充沛，换句话说，他总是情绪高昂的工作。A.patient
耐心的;B.relaxed放松的;C.intelligent
聪明的;D.energetic精力充沛的。根据“he
works
always
in
high
spirits.”可知，这位老教师，差不多有60岁了，总是精力充沛。选D。
2．I
have
no
idea
of
what
is
in
fashion
nowadays,
so
my
choice
might
be
quite
____
.
A．abundant
B．arbitrary
C．considerate
D．aggressive
【答案】B
【解析】考查形容词辨析。句意：我不知道现在什么流行，所以我的选择可能很武断。A.
abundant
大量的，充足的；B.
arbitrary武断的；C.
considerate考虑周到的；D.
aggressive好斗的。根据句意“我不知道现在什么流行，所以我的选择可能很武断”。所以选B。
3．Lucy
tried
to
help,
but
she
was______—as
if
she
was
interfering,
not
helping.
A．dynamic
B．compulsory
C．sacred
D．clumsy
【答案】D
【解析】考查形容词。句意：露西想帮忙，但她笨手笨脚，好像是在干涉别人，而不是在帮忙。A.dynamic动态的；B.compulsory义务的；C.sacred害怕的；D.clumsy笨拙的。结合后文好像是在干涉别人，而不是在帮忙。可知露西笨手笨脚。故答案为D。
4．—
Actually,
you
hurt
Mary
yesterday.
—
Sorry,
I
didn't
mean
to
be
so___________.
A．ambitious
B．abrupt
C．awkward
D．allergic
【答案】B
【解析】考查形容词。句意：——事实上，你昨天伤害了Mary。——不好意思，我不是故意如此唐突的。A.
ambitious
有雄心的；B.
abrupt
唐突的；C.
awkward
尴尬的，笨拙的；D.
allergic
过敏的。根据Actually,you
hurt
Mary
yesterday.可知这里在进行解释，“我不是故意如此唐突的”符合语境，故选B。
5．Joe
is
proud
and
______,
never
admitting
he
is
wrong
and
always
looking
for
someone
else
to
blame.
A．strict
B．sympathetic
C．stubborn
D．sensitive
【答案】C
【解析】考查形容词辨析。句意：Joe是一个既骄傲又固执的人，他从不承认自己错了，总是找另一个人受责备。A.
strict严格的；B.
sympathetic同情的；C.
stubborn顽固的；D.
sensitive敏感的。根据后面的叙述从不承认错误，看来他是顽固的。故选C。
6．The
characterization
of
this
rule's
impact
is
，to
say
the
least,the
critical
point
for
present
purposes
is
put
forward.
A．controversial
B．consistent
C．contemporary
D．conservative
【答案】A
【解析】考查形容词词义辨析。句意：这条规则的影响的描述是有争议的，至少可以说，提出了当前目的的关键点。A.
controversial有争议的；引起争论的；B.
consistent始终如一的；持续的；C.
contemporary同时代的；当代的；D.
conservative保守的；守旧的。根据句意可知，此处用“有争议的”符合语境，故选A项。
7．Only
five
years
after
Steve
Jobs’
death,
smart-phones
defeated
_________PCs
in
sales.
A．controversial
B．contradictory
C．confidential
D．conventional
【答案】D
【解析】考查形容词辨析。句意：仅仅在史蒂夫乔布斯去世五年后，智能手机在销售中击败了传统的个人电脑。A．controversial有争议的；B．contradictory矛盾的；C．confidential机密的；D．conventional传统的。根据常识可知，个人电脑是传统事物，智能手机是新兴事物，故选D。
8．Though
scientists
get
closer
to
understanding
why
we
age，
the
reason
for
different
aging
rates
among
individuals
remains
only
__________
understood．
A．concretely
B．thoroughly
C．vaguely
D．flexible
【答案】C
【解析】考查副词词义辨析。A.
concretely具体地；B.
thoroughly彻底地；C.
vaguely含糊地、茫然地；D.
flexible灵活的。句意：尽管科学家对人类衰老的原因有了更深的了解，但对于个体衰老速度不同的原因，人们仍知之甚少。根据句意可知此处表示“模糊地”，故C项正确。
9．Nadia,
a
four-year-old
female
Malayan
Tiger
at
the
Bronx
Zoo
tested
_______for
the
novel
coronavirus
infection.
It's
the
first
known
case
of
human-to-animal
transmission
in
America.
A．positive
B．poisonous
C．negative
D．neutral
【答案】A
【解析】考查形容词词义辨析。句意：Nadia，Bronx动物园里的一只四岁的雌性马来虎，新型冠状病毒检测为阳性。这是美国第一例已知的人对动物的传播。A.
positive阳性的；B.
poisonous
有毒的；C.
negative否认的；D.
neutral中立的。根据下文“human-to-animal
transmission”可知，Nadia感染了新型冠状病毒，检测为阳性。故选A。
10．It's
unnecessary
that
you
complain
about
the
power
cut
for
_____repair
work
about
the
line
is
being
carried
out
for
the
coming
hurricane.
A．extensive
B．investigative
C．conservative
D．explosive
【答案】A
【解析】考查形容词词义辨析。句意：你没有必要抱怨停电，因为正在为即将到来的飓风进行全面的检修线路工作。A.
extensive大量的，广泛的，全面的；B.
investigative研究的，调查的；C.
conservative保守的；D.
explosive爆炸的，爆发性的。根据空格后的repair
work并结合选项可知，此处指全面的检修线路工作。故选A。
二、单句语法填空
11.
Tom
got
lost
in
the
storm,
but
is
was
_________________
(fortune)
that
his
smartphone
was
fully
charged
and
had
good
reception.
【答案】fortunate
【解析】考查形容词。句意：汤姆在暴风雨中迷路了，但幸运的是他的智能手机充满了电，而且信号接收良好。分析句子可知，设空处应用形容词作表语，结合下文的“his
smartphone
was
fully
charged
and
had
good
reception”可知，用fortunate“幸运的”符合语境。故填fortunate。
12．We
provide
_________________
(medicine)
insurance
for
every
employee.
【答案】medical
【解析】考查形容词。句意：我们为每一个员工提供医疗保险。分析句子可知，设空处应填形容词作定语修饰名词insurance，medical
insurance“医疗保险”。故填medical。
13．When
he
heard
that
he
hadn’t
passed
the
exam,
he
looked
quite
__________
(disappoint).
【答案】disappointed
【解析】考查形容词。句意：当他听说他没有通过考试时，他看起来很失望。上文look为系动词，后跟形容词作表语，且修饰人应用-ed结尾形容词disappointed，表示“（感到）失望的”。故填disappointed。
14．Downloading
this
film
will
take
___________
(rough)
an
hour.
【答案】roughly
【解析】考查副词。句意：下载这部电影需要大约一个小时。分析句子可知，设空处修饰动词take，修饰动词用副词形式，故填roughly。
15．What
makes
the
adobe
dwellings(土坯房)
______
(admire)
is
their
ability
to
"air
condition"
a
house
without
using
electric
equip.
【答案】admirable
【解析】考查形容词。句意：土坯住宅令人钦佩的是它们在不使用电器设备的情况下调节房子气温的能力。此题用形容词作宾补修饰
the
adobe
dwellings，此处填形容词。故填admirable。
16．Cycling
is
highly_____(benefit)to
our
health
and
the
environment.
【答案】beneficial
【解析】考查形容词。句意：骑自行车对我们的健康和环境非常有益。分析句子可知，“be
beneficial
to”意为“对……有益”，是固定搭配，is是系动词，且前面有副词“highly”修饰，应用“benefit”的形容词形式作表语。故填beneficial。
17．Their
Chinese
peers
in
the
typical
Chinese
dress
would
be
highly
______（impress）.
【答案】impressive
【解析】考查形容词。句意：他们的中国同龄人穿着典型的中国服装会给人留下深刻印象。分析句子结构，be为系动词，设空处需填形容词作表语，impressive意为“使人印象深刻的”。故填impressive。
18.It
leads
to
the
illusion(错觉)
that
populations
are
_____
(high)
than
they
actually
are.
【答案】higher
【解析】考查形容词比较级。根据其后than
they
actually
are可知，此处为形容词的比较级，故填higher。
19.
The
central
London
Railway
was
one
of
the
most
______
(success)
of
these
new
lines
【答案】successful
【解析】考查形容词。空格前是most,其后要跟形容词构成最高级，故填successful。
20.
According
to
a
review
of
evidence
in
a
medical
journal,
runners
live
three
years
(long)
than
non-runners.
【答案】longer
【解析】考查副词的比较级。医学报告显示：经常跑步的人比不跑步的人多活3年。根据than可知用比较级，故填longer。
21.
The
water
was
simply
the
container
for
an
act
of
kindness
and
love.
Nothing
could
be
________(sweet)．
【答案】sweeter
【解析】用nothing
与an
act
of
kindness
and
love
相对比，这里是用比较级的否定形式表示最高级。
22.
Sixteen
years
(early),
Pahlsson
had
removed
the
diamond
ring
to
cook
a
meal.
【答案】earlier
【解析】考查副词的比较级。此处表示“16年前”，故填
earlier“……之前，先前”。
23.
People
certainly
have
a
variety
of
reasons
for
going
back
to
school
but
one
important
thing
to
know
is,
no
knowledge
is
________
(use)
【答案】useless
【解析】考查形容词。作表语要用形容词；又由句意可知，作者是表达“没有什么知识是无用的”，故填useless。
24.
The
(big)
the
activity
inequality
of
a
country
is,
the
higher
its
rate
of
obesity
will
be.
【答案】bigger
【解析】考查形容词的比较级。由“the
higher”可知，此处用the+比较级，the+比较级。表示越……越……，故填big的比较级bigger。
25.
It’s
never
too
early
to
make
necessary
preparations
for
a
healthy
and
______
(meaning)
college
experience.
【答案】meaningful
【解析】考查形容词。这里与前面的healthy并列，修饰后面的名词college
experience，故此处也要用形容词。故填meaningful。
26.He
was
very
tired
after
doing
this
for
a
whole
day,
but
he
felt
very
happy
since
the
crop
did
“grow”________(high)．
【答案】higher
【解析】此处grow表示become，为系动词，系动词后应用形容词作表语，而high本身就是形容词，无需
词类转换；由语境可知，比拔苗前＂更高了＂，故用high的比较级higher。
27.
I
was
greatly________（astonish）that
she
had
turned
down
his
kind
offer.
【答案】astonished
【解析】考查形容词。句意：她拒绝了他的好意，这使我大为惊讶。因为句子的主语是人，表示人感到吃惊用astonished；表示令人吃惊的用astonishing。故填astonished。一、单项选择
1.
With
the
widespread
use
of
the
Internet,
communications
across
the
world
have
_____________developed
over
the
years.
A．steadily
B．differently
C．independently
D．formally
【答案】A
【解析】考查副词辨析。句意：随着互联网的广泛使用，世界各地的通信多年来稳步发展。A.
steadily稳定地；B.
differently不同地；C.
independently独立地；D.
formally正式地。此处指稳步发展，故选A。
2．According
to
Professor
Johnson,
we
don’t
have
to
read
the
book
if
we
don’t
want
to,
as
it
is
______.
A．worthwhile
B．necessary
C．optional
D．serious
【答案】C
【解析】考查形容词词义辨析。句意:根据约翰逊教授的说法，如果我们不想读这本书，就不必读，因为它是可选择的。A.
worthwhile值得的；B.
necessary必要的；C.
optional
可选择的，选修的；D.
serious严肃的，认真的。根据“we
don’t
have
to
read
the
book
if
we
don’t
want
to”可知，这本书读不读都可以，由此可知，它是“可选择的”。故选C。
3．A
dog’s
eating
habit
requires
regular
training
before
it
is
________
established.
A．properly
B．widely
C．originally
D．temporarily
【答案】A
【解析】考查副词辨析。句意：在狗的饮食习惯被正确地建立之前，需要定期的训练。A.
properly正确地；B.
widely广泛地；C.
originally最初；D.
temporarily临时地。狗的饮食习惯不可能是被“广泛地、最初地、临时地”建立，故选A。
4．The
outbreak
of
Covid-19
has
meant
an
_____
change
in
our
life
and
work.
A．absurd
B．abrupt
C．allergic
D．authentic
【答案】B
【解析】考查形容词词义辨析。句意:新冠肺炎疫情的爆发，给我们的生活和工作带来了一个突然的变化。A.
absurd荒谬的；B.
abrupt突然的；C.
allergic过敏的；D.
authentic真实的。根据常识可知，新冠肺炎疫情给我们的生活和工作带来了一个突然的变化。故选B。
二、语法填空
5.
On
our
way
to
the
house,
it
was
raining
_______
hard
that
we
couldn’t
help
wondering
how
long
it
would
take
to
get
there.
【答案】so
【解析】考查副词。句意：在我们回家的时候，雨下得太大了，以至于我们不由怀疑能否抵达。用副词修饰形容词so,
so…that…太……以至于…。
6.
After
our
plane
landed,
we
went
to
the
hotel.
We
had
made
our
reservation
six
months________
(early),
but
the
man
at
the
front
desk
said
there
had
been
a
mistake.
【答案】earlier
【解析】考查比较级。由had
made可知该动作发生在到达旅馆之前，故应该是早在六个月之前我们就已经预订了，故填比较级earlier。
7.
In
the
18th
and
19th
centuries,
(wealth)
people
travelled
and
collected
plants,
historical
objects
and
works
of
art.
【答案】wealthy
【解析】考查形容词。句意:在18和19世纪，富人旅行并收集植物、历史物品和艺术品。此处修饰名词people，应使用形容词，做定语。故填wealthy。
8.
Farming
produced
more
food
per
person
hunting
and
gathering，so
people
were
able
to
raise
more
children.
【答案】than
【解析】考查比较级。句意：农业比狩猎和采集的人均粮食产量更高。结合句意可知，此句中将农业生产与狩猎和采集相比，应用比较连词than。more…
than，意为“比……更”故填than。
一、单项选择
1．The
old
teacher,
who
is
almost
sixty,
is
always
_____
and
that
is
to
say,
he
works
always
in
high
spirits.
A．patient
B．relaxed
C．intelligent
D．energetic
2．I
have
no
idea
of
what
is
in
fashion
nowadays,
so
my
choice
might
be
quite
____
.
A．abundant
B．arbitrary
C．considerate
D．aggressive
3．Lucy
tried
to
help,
but
she
was______—as
if
she
was
interfering,
not
helping.
A．dynamic
B．compulsory
C．sacred
D．clumsy
4．—
Actually,
you
hurt
Mary
yesterday.
—
Sorry,
I
didn't
mean
to
be
so___________.
A．ambitious
B．abrupt
C．awkward
D．allergic
5．Joe
is
proud
and
______,
never
admitting
he
is
wrong
and
always
looking
for
someone
else
to
blame.
A．strict
B．sympathetic
C．stubborn
D．sensitive
6．The
characterization
of
this
rule's
impact
is
，to
say
the
least,the
critical
point
for
present
purposes
is
put
forward.
A．controversial
B．consistent
C．contemporary
D．conservative
7．Only
five
years
after
Steve
Jobs’
death,
smart-phones
defeated
_________PCs
in
sales.
A．controversial
B．contradictory
C．confidential
D．conventional
8．Though
scientists
get
closer
to
understanding
why
we
age，
the
reason
for
different
aging
rates
among
individuals
remains
only
__________
understood．
A．concretely
B．thoroughly
C．vaguely
D．flexible
9．Nadia,
a
four-year-old
female
Malayan
Tiger
at
the
Bronx
Zoo
tested
_______for
the
novel
coronavirus
infection.
It's
the
first
known
case
of
human-to-animal
transmission
in
America.
A．positive
B．poisonous
C．negative
D．neutral
10．It's
unnecessary
that
you
complain
about
the
power
cut
for
_____repair
work
about
the
line
is
being
carried
out
for
the
coming
hurricane.
A．extensive
B．investigative
C．conservative
D．explosive
二、单句语法填空
11.
Tom
got
lost
in
the
storm,
but
is
was
_________________
(fortune)
that
his
smartphone
was
fully
charged
and
had
good
reception.
12．We
provide
_________________
(medicine)
insurance
for
every
employee.
13．When
he
heard
that
he
hadn’t
passed
the
exam,
he
looked
quite
__________
(disappoint).
14．Downloading
this
film
will
take
___________
(rough)
an
hour.
15．What
makes
the
adobe
dwellings(土坯房)
______
(admire)
is
their
ability
to
"air
condition"
a
house
without
using
electric
equip.
16．Cycling
is
highly_____(benefit)to
our
health
and
the
environment.
17．Their
Chinese
peers
in
the
typical
Chinese
dress
would
be
highly
______（impress）.
18.It
leads
to
the
illusion(错觉)
that
populations
are
_____
(high)
than
they
actually
are.
19.
The
central
London
Railway
was
one
of
the
most
______
(success)
of
these
new
lines
20.
According
to
a
review
of
evidence
in
a
medical
journal,
runners
live
three
years
(long)
than
non-runners.
21.
The
water
was
simply
the
container
for
an
act
of
kindness
and
love.
Nothing
could
be
________(sweet)．
22.
Sixteen
years
(early),
Pahlsson
had
removed
the
diamond
ring
to
cook
a
meal.
23.
People
certainly
have
a
variety
of
reasons
for
going
back
to
school
but
one
important
thing
to
know
is,
no
knowledge
is
________
(use)
24.
The
(big)
the
activity
inequality
of
a
country
is,
the
higher
its
rate
of
obesity
will
be.
25.
It’s
never
too
early
to
make
necessary
preparations
for
a
healthy
and
______
(meaning)
college
experience.
26.He
was
very
tired
after
doing
this
for
a
whole
day,
but
he
felt
very
happy
since
the
crop
did
“grow”________(high)．
27.
I
was
greatly________（astonish）that
she
had
turned
down
his
kind
offer.
一、单项选择
1.【答案】D
【解析】
考查形容词辨析。句意：这位老教师，差不多有60岁了，总是精力充沛，换句话说，他总是情绪高昂的工作。A.patient
耐心的;B.relaxed放松的;C.intelligent
聪明的;D.energetic精力充沛的。根据“he
works
always
in
high
spirits.”可知，这位老教师，差不多有60岁了，总是精力充沛。选D。
2.【答案】B
【解析】考查形容词辨析。句意：我不知道现在什么流行，所以我的选择可能很武断。A.
abundant
大量的，充足的；B.
arbitrary武断的；C.
considerate考虑周到的；D.
aggressive好斗的。根据句意“我不知道现在什么流行，所以我的选择可能很武断”。所以选B。
3.【答案】D
【解析】考查形容词。句意：露西想帮忙，但她笨手笨脚，好像是在干涉别人，而不是在帮忙。A.dynamic动态的；B.compulsory义务的；C.sacred害怕的；D.clumsy笨拙的。结合后文好像是在干涉别人，而不是在帮忙。可知露西笨手笨脚。故答案为D。
4.【答案】B
【解析】考查形容词。句意：——事实上，你昨天伤害了Mary。——不好意思，我不是故意如此唐突的。A.
ambitious
有雄心的；B.
abrupt
唐突的；C.
awkward
尴尬的，笨拙的；D.
allergic
过敏的。根据Actually,you
hurt
Mary
yesterday.可知这里在进行解释，“我不是故意如此唐突的”符合语境，故选B。
5.【答案】C
【解析】考查形容词辨析。句意：Joe是一个既骄傲又固执的人，他从不承认自己错了，总是找另一个人受责备。A.
strict严格的；B.
sympathetic同情的；C.
stubborn顽固的；D.
sensitive敏感的。根据后面的叙述从不承认错误，看来他是顽固的。故选C。
6.【答案】A
【解析】考查形容词词义辨析。句意：这条规则的影响的描述是有争议的，至少可以说，提出了当前目的的关键点。A.
controversial有争议的；引起争论的；B.
consistent始终如一的；持续的；C.
contemporary同时代的；当代的；D.
conservative保守的；守旧的。根据句意可知，此处用“有争议的”符合语境，故选A项。
7.【答案】D
【解析】考查形容词辨析。句意：仅仅在史蒂夫乔布斯去世五年后，智能手机在销售中击败了传统的个人电脑。A．controversial有争议的；B．contradictory矛盾的；C．confidential机密的；D．conventional传统的。根据常识可知，个人电脑是传统事物，智能手机是新兴事物，故选D。
8.【答案】C
【解析】考查副词词义辨析。A.
concretely具体地；B.
thoroughly彻底地；C.
vaguely含糊地、茫然地；D.
flexible灵活的。句意：尽管科学家对人类衰老的原因有了更深的了解，但对于个体衰老速度不同的原因，人们仍知之甚少。根据句意可知此处表示“模糊地”，故C项正确。
9.【答案】A
【解析】考查形容词词义辨析。句意：Nadia，Bronx动物园里的一只四岁的雌性马来虎，新型冠状病毒检测为阳性。这是美国第一例已知的人对动物的传播。A.
positive阳性的；B.
poisonous
有毒的；C.
negative否认的；D.
neutral中立的。根据下文“human-to-animal
transmission”可知，Nadia感染了新型冠状病毒，检测为阳性。故选A。
10.【答案】A
【解析】考查形容词词义辨析。句意：你没有必要抱怨停电，因为正在为即将到来的飓风进行全面的检修线路工作。A.
extensive大量的，广泛的，全面的；B.
investigative研究的，调查的；C.
conservative保守的；D.
explosive爆炸的，爆发性的。根据空格后的repair
work并结合选项可知，此处指全面的检修线路工作。故选A。
二、单句语法填空
11.【答案】fortunate
【解析】考查形容词。句意：汤姆在暴风雨中迷路了，但幸运的是他的智能手机充满了电，而且信号接收良好。分析句子可知，设空处应用形容词作表语，结合下文的“his
smartphone
was
fully
charged
and
had
good
reception”可知，用fortunate“幸运的”符合语境。故填fortunate。
12.【答案】medical
【解析】考查形容词。句意：我们为每一个员工提供医疗保险。分析句子可知，设空处应填形容词作定语修饰名词insurance，medical
insurance“医疗保险”。故填medical。
13.【答案】disappointed
【解析】考查形容词。句意：当他听说他没有通过考试时，他看起来很失望。上文look为系动词，后跟形容词作表语，且修饰人应用-ed结尾形容词disappointed，表示“（感到）失望的”。故填disappointed。
14.【答案】roughly
【解析】考查副词。句意：下载这部电影需要大约一个小时。分析句子可知，设空处修饰动词take，修饰动词用副词形式，故填roughly。
15.【答案】admirable
【解析】考查形容词。句意：土坯住宅令人钦佩的是它们在不使用电器设备的情况下调节房子气温的能力。此题用形容词作宾补修饰
the
adobe
dwellings，此处填形容词。故填admirable。
16.【答案】beneficial
【解析】考查形容词。句意：骑自行车对我们的健康和环境非常有益。分析句子可知，“be
beneficial
to”意为“对……有益”，是固定搭配，is是系动词，且前面有副词“highly”修饰，应用“benefit”的形容词形式作表语。故填beneficial。
17.【答案】impressive
【解析】考查形容词。句意：他们的中国同龄人穿着典型的中国服装会给人留下深刻印象。分析句子结构，be为系动词，设空处需填形容词作表语，impressive意为“使人印象深刻的”。故填impressive。
18.【答案】higher
【解析】考查形容词比较级。根据其后than
they
actually
are可知，此处为形容词的比较级，故填higher。
19.【答案】successful
【解析】考查形容词。空格前是most,其后要跟形容词构成最高级，故填successful。
20.【答案】longer
【解析】考查副词的比较级。医学报告显示：经常跑步的人比不跑步的人多活3年。根据than可知用比较级，故填longer。
21.【答案】sweeter
【解析】用nothing
与an
act
of
kindness
and
love
相对比，这里是用比较级的否定形式表示最高级。
22.【答案】earlier
【解析】考查副词的比较级。此处表示“16年前”，故填
earlier“……之前，先前”。
23.【答案】useless
【解析】考查形容词。作表语要用形容词；又由句意可知，作者是表达“没有什么知识是无用的”，故填useless。
24.【答案】bigger
【解析】考查形容词的比较级。由“the
higher”可知，此处用the+比较级，the+比较级。表示越……越……，故填big的比较级bigger。
25.【答案】meaningful
【解析】考查形容词。这里与前面的healthy并列，修饰后面的名词college
experience，故此处也要用形容词。故填meaningful。
26.【答案】higher
【解析】此处grow表示become，为系动词，系动词后应用形容词作表语，而high本身就是形容词，无需词类转换；由语境可知，比拔苗前＂更高了＂，故用high的比较级higher。
27.【答案】astonished
【解析】考查形容词。句意：她拒绝了他的好意，这使我大为惊讶。因为句子的主语是人，表示人感到吃惊用astonished；表示令人吃惊的用astonishing。故填astonished。
