中小学教育资源及组卷应用平台
英语连词专项练习
1.The
new
machi
(?http:?/??/?www.21cnjy.com?)ne,
according
to
the
recent
report,
will
work
twice
as
fast,
______
greatly
decreasing
costs.21教育网
A.
so
B.
even
C.
yet
D.
thus
答案及解析：D
句意：据介绍，这台新机器的工作速度
(?http:?/??/?www.21cnjy.com?)将是原来的两倍，从而大大降低了成本。A.
so因此；B.
even甚至；C.
yet但是，然而；D.
thus因此，从而。根据前后两句的内容可知，前面的新机器工作效率是以前的两倍，导致后面的结果，so和thus都有“因此”之意，但so是连词，后面跟句子，而thus是副词，后可以跟动词-ing形式。本句空格后是动词的-ing形式作结果状语，因此要用thus。故选D。
2.-We
are
climbing
Mount
Tai
this
weekend.
-Wonderful!
Take
an
umbrella
with
you________it
rains.
A.
as
if
B.
so
that
C.
in
case
D.
even
if
答案及解析：C
句意：——这个周末我们要去爬泰山。——太
(?http:?/??/?www.21cnjy.com?)棒了！带上雨伞，以防下雨。A.
as
if好像；B.
so
that以便，所以；C.
in
case以防，假使；D.
even
if即使，虽然。本句为条件状语从句，表示“以防”，故选C。
3.The
girl
thoug
(?http:?/??/?www.21cnjy.com?)ht
her
boyfriend
had
bought
her
a
necklace
of
great
value
________
in
fact
it
was
made
of
glass.21世纪教育网版权所有
A
when
B.
while
C.
that
D.
as
答案及解析：B
句意：这个女孩认为她的男朋友给她买了一
(?http:?/??/?www.21cnjy.com?)个价值不菲的项链，然而事实上这条项链是由玻璃制成的。A.
when当；B.
while当，然而；C.
that作为连词；D.
as当，因为，尽管。结合句意可知上下句是对比关系，故用“然而”符合语境，故选B项。21·cn·jy·com
4.----
I
am
going
to
Hainan
for
my
holiday.
----
OK.
Have
fun
________
you
can.
The
hard
times
are
approaching.
A.
until
B.
before
C.
unless
D.
while
答案及解析：D
句意：——我要去海南度假。——好啊。当你
(?http:?/??/?www.21cnjy.com?)还能玩得开心的时候，尽情享受吧。艰难的时刻即将来临。A.
until直到；B.
before在……之前；C.
unless除非；D.
while在……时候。此处为时间状语从句，表示“当……时候”，故选D。www.21-cn-jy.com
5.—
I
like
your
new
shoes!
—
Thanks.
I
ha
(?http:?/??/?www.21cnjy.com?)d
to
try
on
almost
a
dozen
pairs
_________
I
decided
to
get
them.2·1·c·n·j·y
A.
as
B.
when
C.
after
D.
before
答案及解析：D
句意：——我喜欢你的新鞋
(?http:?/??/?www.21cnjy.com?)子。——多谢，我在决定买下之前试了许多双。A.as当……时候；B.when当……时候；C.after在……之后；D.before在……之前。根据语境和选项分析，故选D。
6.----
I
am
going
to
Hainan
for
my
holiday.
----
OK.
Have
fun
________
you
can.
The
hard
times
are
approaching.
A.
until
B.
before
C.
unless
D.
while
答案及解析：D
句意：——我要去海南度假。——好啊。当你还能玩得开心时候，尽情享受吧。艰难的时刻即将来临。A.
until直到；B.
before在……之前；C.
unless除非；D.
while在……时候。此处为时间状语从句，表示“当……时候”，故选D。www-2-1-cnjy-com
7.Make
sure
you
save
(?http:?/??/?www.21cnjy.com?)
all
your
work
on
screen____the
computer
breaks
down.【来源：21cnj
y.co
m】
A.
in
case
B.
as
if
C.
so
that
D.
even
though
答案及解析：A
句意：确保你把所有的工作都保存在屏幕上
(?http:?/??/?www.21cnjy.com?)，以防电脑坏掉。A.
in
case万一；B.
as
if
好像；C.
so
that为了---；D.
even
though即使此处是in
case引导的条件状语从句，故答案为A。2-1-c-n-j-y
8._______
many
Brit
(?http:?/??/?www.21cnjy.com?)s
like
nothing
better
than
spending
their
Sunday
cutting
the
grass,
some
are
happy
just
to
sit
under
the
branches
of
the
tree
and
enjoy
the
beauty
of
the
world
around
them.【出处：21教育名师】
A.
When
B.
Like
C.
As
D.
While
答案及解析：D
句意：虽然许多英国人最喜欢的莫过
(?http:?/??/?www.21cnjy.com?)于在周日割草，但有些人却喜欢坐在树枝下欣赏世界的美景。A.
When当……时；B.
Like像；C.
As正如，因为，如同；D.
While当……时，虽然，尽管。结合句意可知，此处为让步状语从句，选项D.
While“虽然，尽管”，符合语境。故选D。【版权所有：21教育】
9.
I
say
(?http:?/??/?www.21cnjy.com?)Tom
is
a
smart
boy,
he
still
needs
to
work
hard
to
achieve
his
goal.21cnjy.com
A.
Because
B.
When
C.
As
D.
While
答案及解析：D
句意：虽然我说了Tom是个聪明的孩
(?http:?/??/?www.21cnjy.com?)子，但他还是需要努力学习才能完成目标。分析句意可知，前后句逻辑上呈现的是转折关系，其中只有while可以表示转折关系。故选D项。21
cnjy
com
10.【2018·天津】Le
(?http:?/??/?www.21cnjy.com?)t's
not
pick
these
peaches
until
this
weekend
___________they
get
sweet
enough
to
be
eaten.
A.
ever
since
B.
as
if
C.
even
though
D.
so
that
答案及解析：D
句意：让我们这个周末再摘这些桃子，这样
(?http:?/??/?www.21cnjy.com?)的话，它们吃起来就变得足够的甜。A.
ever
since自那时起；B.
as
if好像；C.
even
though尽管；D.
so
that以便。从句为目的状语从句，故用so
that引导。故选D。
11.To
solve
the
short
(?http:?/??/?www.21cnjy.com?)age
of
electricity,the
government
has
taken
some
measures,
but
it
will
be
some
time________the
situation
returns
to
normal.
A.
since
B.
when
C.
before
D.
unless
答案及解析：C
句意：为了解决缺乏电的情
(?http:?/??/?www.21cnjy.com?)况，政府采取了一些措施，但是也许一段时间以后情况才能恢复正常。A.
since自从；B.
when当.......时候；C.
before在......之前；D.
unless除非。“It+be+一段时间+before......”是固定结构，表示一段时间以后某事才发生。before时间状语从句里用一般现在时表示将来时，主句里可以使用将来时或者情态动词。故选C项。21教育名师原创作品
12.Don’t
act
before
yo
(?http:?/??/?www.21cnjy.com?)u
have
a
second
thought
about
the
mission_____
you
are
unable
to
handle
any
potential
emergency.21·世纪
教育网
A.
as
long
as
B.
so
that
C.
even
if
D.
in
case
答案及解析：D
句意：接受任务时要三思而后行，
(?http:?/??/?www.21cnjy.com?)以免你解决不了潜在的紧急情况。A.
as
long
as只要；B.
so
that以便，因此；C.
even
if尽管；D.
in
case以免。结合句意可知此处用“以免”符合语境，in
case引导目的状语从句，故选D项。
13.The
only
problem
(?http:?/??/?www.21cnjy.com?)was
______
we
kept
getting
lost!
But
people
in
Tianjin
were
very
friendly
and
helpful.
A.
that
B.
why
C.
whether
D.
what
答案及解析：A
句意：唯一的问题是我们总是迷路！
(?http:?/??/?www.21cnjy.com?)但是天津人非常友好，乐于助人。A.
that名词性从句连接词；B.
why为什么；C.
whether是否；D.
what什么。根据系动词was可知此处是that引导的表语从句，表语从句中that
只起连接作用，没有含义。故选A项。21
cnjy
com
14.Most
peopl
(?http:?/??/?www.21cnjy.com?)e
quit
________
any
results
appear;
they
give
up
too
soon
and
a
quitter
never
wins.
A.
while
B.
until
C.
since
D.
before
答案及解析：D
句意：大多数人在任何结果出现之前就放
(?http:?/??/?www.21cnjy.com?)弃了;他们放弃得太早，放弃的人永远不会成功。A.
while当……时候；B.
until直到……C.
since自从……以来；D.
before
在……之前。由下文的they
give
up
too
soon太
快
放
弃可知，大多数人是在结果出现之前就放弃了。故选D。
15.It
sounds
l
(?http:?/??/?www.21cnjy.com?)ike
something
is
wrong
with
the
car’s
engine.
________,
we’d
better
take
it
to
the
garage
immediately.
A.
Otherwise
B.
If
not
C.
But
for
that
D.
If
so
答案及解析：D
句意：听起来像是发动机有问题，如果是这样的
(?http:?/??/?www.21cnjy.com?)话，我们最好马上去修理厂。A.
Otherwise否则；B.
If
not如果不；C.
But
for
that要不是；D.
If
so如果是这样的话。根据语境，故选D。
16.（2016·浙江）
(?http:?/??/?www.21cnjy.com?)
online
shopping
has
changed
our
life,
not
all
of
its
effects
have
been
positive.
A.
Since
B.
After
C.
While
D.
Unless
答案及解析：C
句意：尽管网上购物已经改变了我
(?http:?/??/?www.21cnjy.com?)们的生活，但是不是其所有的影响都是积极的。while引导让步状语从句，意为“尽管，虽然”；since既然，自从；after在……之后；unless除非。故选C。
17.______the
damag
(?http:?/??/?www.21cnjy.com?)e
is
done,
it
will
take
many
years
for
the
farmland
to
recover.
A.
Until
B.
Unless
C.
Once
D.
Although
答案及解析：C
句意：一旦农田被毁坏，将需要许多年
(?http:?/??/?www.21cnjy.com?)的时间才能得以恢复。A.
until到……为止，直到……才，在……以前；B.
unless如果不，除非；C.
once一旦，一经……便；D.
although虽然，然而，尽管。前后是时间先后关系，故选C。
18.James,
I
don’t
min
(?http:?/??/?www.21cnjy.com?)d
lending
you
the
money
____
you
pay
it
back
within
a
month.
A.
although
B.
now
that
C.
unless
D.
as
long
as
答案及解析：D
A.
although尽管；B.
(?http:?/??/?www.21cnjy.com?)now
that既然；C.
unless除非；D.
as
long
as只要。句意：杰姆斯，我不介意借给你钱只要你在一个月内还给我。故选D。
19.What
an
unforget
(?http:?/??/?www.21cnjy.com?)table
experience!
I’ll
write
it
down
_______
it
is
still
fresh
in
my
memory.
A.
since
B.
after
C.
while
D.
until
答案及解析：C
句意：多么一次令人难忘的经历呀！
(?http:?/??/?www.21cnjy.com?)趁着在我还记忆犹新我将把它写下来。since
自从；after
在什么之后；while
当什么时候；until直到。句中while作连词用，表示引导时间状语，所以选C。
20.He
found
it
inc
(?http:?/??/?www.21cnjy.com?)reasingly
difficult
to
read,________
his
eyesight
was
beginning
to
fail.【来源：21·世纪·教育·网】
A.
and
B.
but
C.
or
D.
for
答案及解析：D
句意：他发现看书越来越费劲
(?http:?/??/?www.21cnjy.com?)，因为他的视力开始变弱。A.
and并且；B.
but但是；C.
or否则；D.
for因为。根据句意可知“视力变弱”是“看书越来越费劲”的原因，故D项正确。
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21世纪教育网(www.21cnjy.com)中小学教育资源及组卷应用平台
英语连词专项练习
1.It
has
been
found
(?http:?/??/?www.21cnjy.com?)through
modern
technology
that
_______
one
is
using
chopsticks,
over
30
joints
and
over
50
muscles
are
used,
which
is
a
favorable
stimulation
to
the
brain.21教育网
A.
since
B.
although
C.
unless
D.
while
2.Tom
is
so
independe
(?http:?/??/?www.21cnjy.com?)nt
that
he
never
asks
his
parents''
opinion
he
wants
their
support.
21cnjy.com
A.
since
B.
once
C.
unless
D.
after
3.He
smiled
politely
________
Lucy
apologized
for
her
drunken
friends
A.
though
B.
as
C.
unless
D.
how
4.________
I
can’t
he
(?http:?/??/?www.21cnjy.com?)lp
admiring
her
courage,
I
think
it’s
barely
acceptable
for
an
inexperienced
driver
to
drive
alone
on
the
freeway.
A.
Unless
B.
As
C.
Since
D.
While
5._____
inter
(?http:?/??/?www.21cnjy.com?)est
in
studying
abroad
is
rising,
more
Chinese
students
who
study
abroad
are
also
returning
home
upon
completing
their
degrees.
A.
Once
B.
Since
C.
While
D.
Until
6.______
violin
is
his
main
focus,
David
is
also
excellent
at
guitar.
A.
Since
B.
Once
C.
Unless
D.
While
7._________we
relie
(?http:?/??/?www.21cnjy.com?)ve
pressure
in
a
proper
way,
we
can
relax
ourselves
and
keep
away
from
its
bad
effects.2·1·c·n·j·y
A.
So
that
B.
As
long
as
C.
Even
if
D.
As
though
8.Mary
rushed
hom
(?http:?/??/?www.21cnjy.com?)e______
she
heard
the
news,
only
______
that
her
husband
was
gone.【来源：21·世纪·教育·网】
A.
as
soon
as;
finding
B.
immediately;
to
find
C.
the
moment;
find
D.
when;
found
9.-I’d
like
to
find
a
job
in
the
library.
-Good
idea,
______
it
doesn’t
affect
your
studies.www-2-1-cnjy-com
A.
now
that
B.
as
soon
as
C.
as
long
as
D.
even
if
10.The
dog
may
be
(?http:?/??/?www.21cnjy.com?)
a
good
companion
for
the
old.
_______,
the
need
to
take
it
for
walks
may
be
a
disadvantage.2-1-c-n-j-y
A.
Besides.
B.
However
C.
Therefore
D.
Instead.
11.________they
decide
(?http:?/??/?www.21cnjy.com?)
which
college
to
go
to，students
should
research
the
admission
procedures.21世纪教育网版权所有
A.
As
B.
While
C.
Until
D.
Once
12.Chinese
st
(?http:?/??/?www.21cnjy.com?)udents
overseas
are
encouraged
to
return,
______
they
honestly
fill
out
medical
forms
and
strictly
follow
the
quarantine
rules.
A.
though
B.
as
long
as
C.
unless
D.
the
moment
13.—
We’ll
v
(?http:?/??/?www.21cnjy.com?)isit
the
Summer
Palace__________
there
is
a
heavy
rain
tomorrow.【来源：21cnj
y.co
m】
—
OK!
Boating
on
the
lake
must
be
great
fun.
A.
unless
B.
since
C.
until
D.
if
14.She
is
now
deter
(?http:?/??/?www.21cnjy.com?)mined
to
push
further
and
keep
on
going
________
she
once
felt
like
giving
up.
【出处：21教育名师】
A.
where
B.
as
C.
in
case
D.
now
that
15.—
I
like
your
new
shoes!
—
Thanks.
I
had
to
(?http:?/??/?www.21cnjy.com?)try
on
almost
a
dozen
pairs
_________
I
decided
to
get
them.【版权所有：21教育】
A.
as
B.
when
C.
after
D.
before
16.The
new
machin
(?http:?/??/?www.21cnjy.com?)e
according
to
the
report,
will
work
twice
as
fast,
______
greatly
reducing
costs.21·世纪
教育网
A.
so
B.
even
C.
yet
D.
thus
17.My
skating
teache
(?http:?/??/?www.21cnjy.com?)r
was
really
great
and
______
I
knew
it,
I
was
able
to
skate!21·cn·jy·com
A.
before
B.
since
C.
until
D.
after
18.I
was
taught
to
(?http:?/??/?www.21cnjy.com?)
sit
quietly
in
class
and
not
to
speak______
someone
asked
me
a
question.21
cnjy
com
A.
When
B.
unless
C.
because
D.
if
19.—Did
you
return
Fred’s
call?
—I
didn’t
need
to
____
I’ll
see
him
tomorrow.
A.
though
B.
unless
C.
when
D.
because
20.—
I
like
your
new
shoes!
—
Thanks.
I
had
to
(?http:?/??/?www.21cnjy.com?)try
on
almost
a
dozen
pairs
_________
I
decided
to
get
them.www.21-cn-jy.com
A.
as
B.
when
C.
after
D.
before
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英语连词专项练习
1.It
has
been
(?http:?/??/?www.21cnjy.com?)found
through
modern
technology
that
_______
one
is
using
chopsticks,
over
30
joints
and
over
50
muscles
are
used,
which
is
a
favorable
stimulation
to
the
brain.21世纪教育网版权所有
A.
since
B.
although
C.
unless
D.
while
【答案】：D
句意：现代科学发现，当人在
(?http:?/??/?www.21cnjy.com?)用筷子时，有30个关节和50块肌肉共同作用，这对于大脑来说是个有利的刺激。A.
since因为；B.
although虽然；C.
unless除非；D.
while当……时候。根据题意可知，while引导时间状语从句。故选D项。21cnjy.com
2.Tom
is
so
independe
(?http:?/??/?www.21cnjy.com?)nt
that
he
never
asks
his
parents''
opinion
he
wants
their
support.
2·1·c·n·j·y
A.
since
B.
once
C.
unless
D.
after
【答案】：C
句意：汤姆非常独立，除非他想得到父母的支持，
(?http:?/??/?www.21cnjy.com?)否则他从不征求父母的意见。A.?
since
自从……以来；B.?
once
一旦；C.?
unless
除非；D.?
after在……之后。此处表示“除非”需要父母的支持，所以是unless引导的条件状语从句。故选C。
【来源：21·世纪·教育·网】
3.He
smiled
politely
________
Lucy
apologized
for
her
drunken
friends
A.
though
B.
as
C.
unless
D.
how
【答案】：B
句意：当露西为她喝醉的朋友道歉时，他礼貌地微
(?http:?/??/?www.21cnjy.com?)笑着。A.
though即使；B.
as当……时候；C.
unless除非；D.
how如何。分析句子可知，空白处引导时间状语从句，意为“当……时”，故选B。
4.________
I
can’t
help
admiring
her
courage,
I
think
it’s
barely
acceptable
for
an
inexperienced
driver
to
drive
alone
on
the
freeway.
A.
Unless
B.
As
C.
Since
D.
While
【答案】：D
句意：虽然我情不自禁地钦佩她的勇
(?http:?/??/?www.21cnjy.com?)气，但是我认为没有经验的驾驶员独自在高速公路上开车几乎是不能接受的。选项A中的
unless引导条件状语从句，意思是“如果不，除非”。选项B中的as引导时间状语从句，表示“当…的时候”的意思。选项C
中的since可引导时间状语从句，表示“自从…以来”。选项D中的
while引导让步状语从句，表示“虽然，尽管”。例如：While?the
grandparents
love
the
children,
they
are
strict
with
them.
虽然祖父母们爱小孩子,但却对他们要求严格。本题符合这个例子的用法，故选D。21·世纪
教育网
5._____
interest
in
s
(?http:?/??/?www.21cnjy.com?)tudying
abroad
is
rising,
more
Chinese
students
who
study
abroad
are
also
returning
home
upon
completing
their
degrees.
A.
Once
B.
Since
C.
While
D.
Until
【答案】：C
句意：虽然出国留学的兴趣正在上升，但更
(?http:?/??/?www.21cnjy.com?)多的中国留学生在完成学业后也会回国。A.
Once一旦；B.
Since因为；C.
While虽然；当……时候；D.
Until直到。本句引导让步状语从句，表示“虽然”，故选C。
6.______
violin
is
his
main
focus,
David
is
also
excellent
at
guitar.
A.
Since
B.
Once
C.
Unless
D.
While
【答案】：D
。句意：虽然小提琴是大卫的主要兴趣
(?http:?/??/?www.21cnjy.com?)，但他的吉他也很好。A.
Since因为，自从；B.
Once一旦；C.
Unless除非，如果不；D.
While尽管。前后两句之间是转折关系，该空引导让步状语从句。故选D。
7._________we
re
(?http:?/??/?www.21cnjy.com?)lieve
pressure
in
a
proper
way,
we
can
relax
ourselves
and
keep
away
from
its
bad
effects.【来源：21cnj
y.co
m】
A.
So
that
B.
As
long
as
C.
Even
if
D.
As
though
【答案】：B
句意：只要我们用适当的方法缓解压力，我
(?http:?/??/?www.21cnjy.com?)们就可以让自己放松，并且远离它带来的不好影响。A.
So
that因此；B.
As
long
as只要；C.
Even
if尽管，即使；D.As
though好像。根据后句“we
can
relax
ourselves
and
keep
away
from
its
bad
effects.”可知，此处用as
long
as“只要”，引导条件状语从句。故选B项【版权所有：21教育】
8.Mary
rushed
hom
(?http:?/??/?www.21cnjy.com?)e______
she
heard
the
news,
only
______
that
her
husband
was
gone.
A.
as
soon
as;
finding
B.
immediately;
to
find
C.
the
moment;
find
D.
when;
found
【答案】：B
句意：Mary一听到这个消息就冲回家
(?http:?/??/?www.21cnjy.com?)，结果却发现她丈夫已经不在了。第一空，A.
as
soon
as一……就……；B.
immediately一……就……；C.
the
moment一……就……；D.
when当……时候，第一空引导时间状语从句，表示“一……就……”，故排除D选项；第二空中根据上文only
to
do
sth.表示“不料竟会……”，后跟不定式做结果状语，故排除A、C选项。故选B。21·cn·jy·com
9.-I’d
like
to
find
a
job
in
the
library.
-Good
idea,
______
it
doesn’t
affect
your
studies.www-2-1-cnjy-com
A.
now
that
B.
as
soon
as
C.
as
long
as
D.
even
if
【答案】：C
句意：——我想在图书馆找一份工作。——
(?http:?/??/?www.21cnjy.com?)好主意，只要不影响你的学习。A.
now
that由于；B.
as
soon
as一……就……；C.
as
long
as只要；D.
even
if虽然。根据上文Good
idea可知对方支持在图书馆找工作，但是条件是“只要（as
long
as）”不影响学习，as
long
as引导条件状语从句。故选C。
10.The
dog
m
(?http:?/??/?www.21cnjy.com?)ay
be
a
good
companion
for
the
old.
_______,
the
need
to
take
it
for
walks
may
be
a
disadvantage.
A.
Besides.
B.
However
C.
Therefore
D.
Instead.
【答案】：B
前一句话有good，后面一句话有disadvantage，前后两句话有转折关系，所以选择
however。句意：狗也许是老年人的好陪伴。然而需要带着狗去散步时也许有不便。
11.________they
d
(?http:?/??/?www.21cnjy.com?)ecide
which
college
to
go
to，students
should
research
the
admission
procedures.
A.
As
B.
While
C.
Until
D.
Once
【答案】：D
once在句中引导状语从句，表示“一旦”。句意为：一旦学生决定上哪个大学，他们就应该了解一下入学手续。其他几项不合题意。
12.Chinese
s
(?http:?/??/?www.21cnjy.com?)tudents
overseas
are
encouraged
to
return,
______
they
honestly
fill
out
medical
forms
and
strictly
follow
the
quarantine
rules.
A.
though
B.
as
long
as
C.
unless
D.
the
moment
【答案】：B
句意：中国留学生被鼓励回国，只要他
(?http:?/??/?www.21cnjy.com?)们诚实地填写医疗表格，严格遵守检疫规则。A.
though尽管；B.
as
long
as只要；C.
unless除非；D.
the
moment一……就……。后文是条件状语，根据句意，故选B。
13.—
We’ll
visit
(?http:?/??/?www.21cnjy.com?)
the
Summer
Palace__________
there
is
a
heavy
rain
tomorrow.21教育网
—
OK!
Boating
on
the
lake
must
be
great
fun.
A.
unless
B.
since
C.
until
D.
if
【答案】：A
句意：——如果明天不下大雨，我们就
(?http:?/??/?www.21cnjy.com?)要去参观颐和园。——好吧，在湖上泛舟肯定很有趣。A.
unless除非，如果不；B.
since由于，自从……以来；C.
until直到……为止；D.
if是否，如果。结合语境可知选A。21
cnjy
com
14.She
is
now
(?http:?/??/?www.21cnjy.com?)
determined
to
push
further
and
keep
on
going
________
she
once
felt
like
giving
up.
【出处：21教育名师】
A.
where
B.
as
C.
in
case
D.
now
that
【答案】：A
句意：现在，她决定进一步努力，
(?http:?/??/?www.21cnjy.com?)在自己曾经想要放弃的地方继续前行。where在……地方；as按照，正如；in
case以防万一；now
that既然，由于。结合句意，她是想从曾经想要放弃的地方继续前行，表示地点用where。故选A项。
15.—
I
like
your
new
shoes!
—
Thanks.
I
had
to
try
(?http:?/??/?www.21cnjy.com?)
on
almost
a
dozen
pairs
_________
I
decided
to
get
them.
A.
as
B.
when
C.
after
D.
before
【答案】：D
句意：——我喜欢你的新鞋子。——多谢
(?http:?/??/?www.21cnjy.com?)，我在决定买下之前试了许多双。A.as当……时候；B.when当……时候；C.after在……之后；D.before在……之前。根据语境和选项分析，故选D。
16.The
new
m
(?http:?/??/?www.21cnjy.com?)achine
according
to
the
report,
will
work
twice
as
fast,
______
greatly
reducing
costs.
A.
so
B.
even
C.
yet
D.
thus
【答案】：D
句意：据介绍，这台新机器
(?http:?/??/?www.21cnjy.com?)的工作速度将是原来的两倍，从而大大降低了成本。A.
so因此；B.
even甚至；C.
yet但是，然而；D.
thus因此，从而。根据前后两句的内容可知，前面的新机器工作效率是以前的两倍，导致后面的结果，so和thus都有“因此”之意，但so是连词，后面跟句子，而thus是副词，后可以跟动词-ing形式。本句空格后是动词的-ing形式作结果状语，因此要用thus。故选D。
17.My
skating
teac
(?http:?/??/?www.21cnjy.com?)her
was
really
great
and
______
I
knew
it,
I
was
able
to
skate!21
cnjy
com
A.
before
B.
since
C.
until
D.
after
【答案】：A
句意：我的滑冰老师真的很棒，在我知道这
(?http:?/??/?www.21cnjy.com?)一点之前，我已经会滑冰了。A.
before在……之前；B.
since自从；C.
until直到；D.
after在……之后。根据“I
knew
it,
I
was
able
to
skate!”可知此处表示“在……之前”，故A项正确。21教育名师原创作品
18.I
was
taught
to
s
(?http:?/??/?www.21cnjy.com?)it
quietly
in
class
and
not
to
speak______
someone
asked
me
a
question.
A.
When
B.
unless
C.
because
D.
if
【答案】：B
句意：我被教导要静静地坐在课堂上不说话
(?http:?/??/?www.21cnjy.com?)除非有人问我问题。A.
when当……时候；B.
unless除非；C.
because因为；D.
if如果。根据句意，除非有人问我问题，在课堂我就安静地坐着不说话。用unless引导条件状语从句。故选B。www.21-cn-jy.com
19.—Did
you
return
Fred’s
call?
—I
didn’t
need
to
____
I’ll
see
him
tomorrow.
A.
though
B.
unless
C.
when
D.
because
【答案】：D
句意：——你给Fred回电话了吗？——我没必
(?http:?/??/?www.21cnjy.com?)要，因为明天我要去见他。A.
though虽然；B.unless除非；C.when当……时；D.because因为。分析句意可知，本句为原因状语从句。故选B项。
20.—
I
like
your
new
shoes!
—
Thanks.
I
had
(?http:?/??/?www.21cnjy.com?)
to
try
on
almost
a
dozen
pairs
_________
I
decided
to
get
them.2-1-c-n-j-y
A.
as
B.
when
C.
after
D.
before
【答案】：D
句意：——我喜欢你的新鞋子。——多
(?http:?/??/?www.21cnjy.com?)谢，我在决定买下之前试了许多双。A.as当……时候；B.when当……时候；C.after在……之后；D.before在……之前。根据语境和选项分析，故选D。
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