(共16张PPT)
英语·必修3(人教版)
第一学时
Reading
and
Comprehension
Task
1
快速阅读课文“How
life
began
on
the
earth”，以约30词写出文章的段落大意。
温馨提示：本文是科普文，属于说明文的范畴，写摘要时要抓住文章要说明的主要问题：地球上生命起源的几个主要阶段。
语
篇
理
解
____________________________________________________________________________________________________________________________________________________________________________________________________________________
语
篇
理
解
答案：The
passage
explains
how
life
began
on
the
earth.After
the
earth
exploded
and
produced
water
whose
continued
presence
made
it
possible
for
life
to
develop,
plants
and
animals
including
human
beings
appeared
on
the
earth.
Task
2
语
篇
理
解
根据课文“How
life
began
on
the
earth”，选择正确答案。
1．From
Paragraph
1
we
can
know
that
stars
are
created
from________．
A．air
B．atoms
C．rocks
D．ice
B
2．What
does
the
word
“they”
refer
to
in
the
sentences
“It
exploded
loudly
with
fire
and
rock.They
were
in
time
to
produce
carbon,
nitrogen，water
vapour
and...”
in
Paragraph
2?
A．Planets.
B．Stars.
C．Gases.
D．Fire
and
rock.
语
篇
理
解
D
3．Which
is
the
right
order
of
the
development
of
life?
A．Small
clever
animals—shellfish—dinosaurs—
mammals.
B．Shellfish—dinosaurs—small
clever
animals—
mammals.
语
篇
理
解
C
C．Shellfish—dinosaurs—mammals—small
clever
animals.
D．Dinosaurs—shellfish—mammals—small
clever
animals.
语
篇
理
解
4．Why
were
mammals
different
from
other
life
forms?
A．They
gave
birth
to
young
baby
animals
and
produced
milk
to
feed
them.
B．They
produced
young
generally
by
laying
eggs.
C．They
were
able
to
live
on
land
as
well
as
in
the
water.
D．They
live
on
grass.
A
语
篇
理
解
5．What
problem
is
caused
by
human
beings?
A．They
exist
everywhere
on
the
earth.
B．They
cause
global
warming.
C．They
find
new
methods
of
growing
crops.
D．They
enjoy
hunting
and
fishing.
语
篇
理
解
B
Task
3
语
篇
理
解
Insects
Amphibians
Reptiles
Dinosaurs
Mammals
including
3．________
Water
Land
animals
human
beings
Task
4
根据课文“How
life
began
on
the
earth”，在下文空格中填上恰当的词语，使文章连贯完整。
No
one
knows
exactly
1.________the
earth
began.According
to
a
widely
accepted
theory,
the
earth
began
with
a
“Big
Bang”，2.________exploded
loudly
and
produced
water
vapour
and
manygases，3.________(make)
the
earth's
atmosphere.As
the
earth
cooled
down,
water
appeared
and
stayed
4.________the
surface.It
was
the
how
which
making
语
篇
理
解
on
presence
of
water
5.________allowed
the
earth
to
dissolve
harmful
gases
and
acids
into
the
oceans
and
seas,
which
made
6.________possible
for
life
to
develop.First,
the
appearance
of
small
plants
encouraged
the
development
of
early
shellfish
and
all
sorts
of
fish.Next,
green
plants
began
to
grow
on
land.7.________were
followed
by
land
animals.So
reptiles
appeared
for
the
first
time.Later,
dinosaurs
developed.8.________，
they
suddenly
disappeared.After
that,
mammals
came
into
that
it
语
篇
理
解
They
However
being.Finally,
humans
appeared
and
spread
all
over
the
earth.However,
they
are
putting
too
much
carbon
dioxide
into
the
atmosphere,
making
the
earth
too
hot
9.________(live)
on.So
whether
life
will
continue
on
the
earth
will
depend
on
10.________this
problem
can
be
solved.
语
篇
理
解
to
live
whether(共10张PPT)
英语·必修3(人教版)
第四学时 Writing
辩论报告属于议论文。写作时要注意论点和论据之间的逻辑性以及不同论据之间的层次性。议论文一般用现在时，全文通常包含以下四部分：
第一部分：开门见山，说明辩论的主题(what)、参与者(who)等。
第二部分：列举正方观点及理由。
第三部分：列举反方观点及理由。
写
作
指
导
如何写好辩论报告
写
作
指
导
第四部分：得出结论或提出自己的观点。
常用句型
?We
had
a
heated
discussion
about...
?Opinions
about...are
divided.
?Different
people
have
different
opinions/ideas
about...
?Every
coin
has
two
sides.
?Some/Others
think/believe/claim
that...
?Most
of
them
support
it.
写
作
指
导
??50%
of
them
are
for
it.
?Half
of
them
hold
a
different
view.
?Some
argue
against...
?Those
who
are
in
favor
of...hold
the
view
that...
?Firstly/Foremost...Secondly/What's
more/In
addition/Besides...Thirdly...
?All
in
all，we
can
safely
come
to
the
conclusion
that...
写
作
指
导
(5)对人物的评价。
?sb.
be
one
of
the/best
/most
important/outstanding
person.
?sb.
be
honored/regarded/considered
as...
描述人物性格的词语：
amiable
和气可亲的
considerate
体贴的
generous
慷慨大方的
hospitable
殷勤的，好客的
strong－willed
意志刚强的
aggressive
有进取心的
ambitious
有雄心壮志的
arrogant
傲慢的
competent
能胜任的(capable)
dependable
可靠的(reliable)
写
作
指
导
depressed
意志消沉的
determined
坚决的
easygoing
脾气随和的
enthusiastic
充满热情的
industrious
勤奋的(diligent)
indifferent
冷漠的
learned
精通某门学问的
well－educated
受过良好教育的
写
作
指
导(共43张PPT)
英语·必修3(人教版)
第三学时 Using
Language：
Reading，Listening
and
Speaking
课
前
热
身
Ⅰ.单词默写
1．________________
n.
气候
2．________________
n.
生物学家
3．________________
n.
万有引力；重力
4．________________
n.
减少
5．________________
n.
宇宙飞船
6．________________
v.
碰撞；坠落
climate
biologist
gravity
lessen
spaceship
crash
课
前
热
身
7．________________n．&
vt.
牵引力；拉，拖
8．________________
v．(使)浮动n.
漂浮物
9．________________
adj.
温和的；文雅的
10．________________
adj.筋疲力尽的
pull
float
gentle
exhausted
课
前
热
身
Ⅱ.短语熟记
1．________________挡住(光线)
2．________________感到振奋，感到高兴
3．________________既然，由于
4．________________爆发，突发
5．________________提防，当心
6．as
a
result________________
block
out
cheer
up
now
that
break
out
watch
out
for
结果
课
前
热
身
7．crash
into________________
8．make
a
trip________________
9．get
the
hang
of________________
撞上
旅行
掌握、理解
课
前
热
身
Ⅲ.佳句背诵
1．The
gravity
on
the
moon
will
not________________the
earth's.
月球上的引力没有地球上的那么强。
2．But
when
I
tried
to____________，I
found
I
was
carried____________________on
the
earth
and
fell
over.
当我试着向前迈步的时候，步子的跨度竟是在地球上的两倍，因而我摔倒了。
as
strong
a
pull
as
step
forward;
twice
as
far
as
课
前
热
身
3．We
watched，________as
fire____________on
the
outside
of
the
spaceship________the
earth's
gravity
increased.
我们惊奇地看着，随着地球引力的增加，宇宙飞船的外层燃烧起火。
amazed
broke
out
as
语
篇
理
解
Task
1
仔细阅读课文“A
visit
to
the
Moon”，以约30词写出文章的段落大意。
温馨提示：本文是记叙文，写摘要时要扣住记叙文的几大要素：时间、地点、人物、事件、结果等。
___________________________________________________________________________________________________________________
答案：Last
month,
the
author
visited
the
moon
with
his
friend
in
their
spaceship.They
experienced
the
changes
of
the
earth's
gravity
and
knew
much
more
about
it.
语
篇
理
解
?Task
2
根据课文“A
visit
to
the
Moon”，选择正确答案。
1．How
many
times
did
the
force
of
gravity
change
during
the
journey?
A．Once. B．Twice.
C．Three
times.
D．Four
times.
C
语
篇
理
解
2．When
was
the
force
of
gravity
largest
during
the
journey?
A．When
they
just
left
the
earth.
B．When
they
just
arrived
at
the
moon.
C．When
they
were
in
the
space.
D．When
they
left
the
moon.
A
语
篇
理
解
3．Why
did
the
writer
fall
over
on
the
moon?
A.
Because
he
suffered
from
air
sickness.
B．Because
the
moon
was
very
rough.
C．Because
he
hasn't
get
used
to
the
moon's
gravity
yet.
D．Because
the
gravity
on
the
moon
differs
from
that
on
the
earth.
D
语
篇
理
解
4．Which
of
the
following
is
wrong
according
to
the
passage?
A．The
gravity
became
very
strong
as
the
writer
left
the
earth's
atmosphere.
B．The
writer
floated
in
the
spaceship
when
it
was
in
space.
C．Walking
on
the
moon
is
impossible
as
the
gravity
has
changed.
D．The
trip
to
the
moon
made
the
writer
very
tired.
C
语
篇
理
解
5．When
they
gradually
got
close
to
the
moon，________．
A．they
felt
the
gravity
was
stronger
and
stronger
B．they
didn't
feel
the
gravity
C．they
watched
the
moon
was
smaller
and
smaller
D．they
watched
the
earth
was
larger
and
larger
A
口
语
训
练
Part
A Role
Play
情景：
记者王芳在采访张华。
角色：王芳和张华。
任务：请你和你的朋友分别扮演一个角色，根据中文提示提出问题，然后根据课文内容回答问题。
Q1：你什么时候去的月球？
和谁去的？
________________________________________________________________________
Q1:
When
did
you
visit
the
moon?
And
with
whom?
A1:
Last
month,
I
visited
the
moon
with
my
friend
Li
口
语
训
练
___________________________________
Q2：离开地球的时候，你有什么感觉？
________________________________________________________________________
Yanping.
Q2：When
you
left
the
earth,
how
did
you
feel?
A2:
I
felt
the
force
of
the
gravity
became
strong.
口
语
训
练
Q3:
在接近月球时，你有什么感觉？
___________________________________________________________________________________________________________________________________________________________________________________________
Q3:
How
did
you
feel
when
you
were
closing
the
moon?
A3：When
I
was
closing
the
moon,
I
felt
the
moon's
gravity
pulling
us,
but
it
is
not
so
strong
as
the
earth's,
so
I
floated
around
in
the
spaceship
cabin.
口
语
训
练
Q4：到达月球后，你做了什么？
________________________________________________________________________________________________
Q5：你喜欢漫步月球吗？
________________________________________________________________________
Q4：When
you
reached
the
moon,
what
did
you
do?
A4：I
tried
to
step
forward
but
I
fell
over.
Q5：Did
you
enjoy
walking
on
the
moon?
A5：Yes.I
liked
walking
on
the
moon
very
much.
口
语
训
练
Q6：旅程结束时你有何感想？
________________________________________________________________________________________________________________________________________________
Q6：How
did
you
feel
at
the
end
of
the
journey?
A6：I
was
excited
although
the
journey
was
exhausting
and
I
hoped
to
visit
another
star
next
time.
Part
B Retelling
口
语
训
练
请参照上述问题及答案，用自己的话复述课文。
关键词：moon
月球
force力量 gravity
重力 float
漂浮 fall
over
摔跤
enjoy
喜欢
______________________________________________________________________________________________________________________________________________
Last
month,
the
writer
visited
the
moon.When
he
left
the
earth,
he
felt
the
force
of
the
gravity
became
strong,
but
he
floated
around
in
the
spaceship
口
语
训
练
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
cabin
when
he
was
closing
the
moon.As
soon
as
he
reached
the
moon,
he
tried
to
step
forward,
but
he
fell
over.Later
he
could
enjoy
walking
on
the
moon.At
the
end
he
was
excited
although
the
journey
was
exhausting
and
he
hoped
to
visit
another
star
next
time.
1．As
the
rocket
rose
into
the
air，we
were
pushed
back
into
our
seats
because
we
were
trying
to
escape
the
pull
of
the
earth's
gravity.(p.30)
随着火箭徐徐升空，我们慢慢逃离地球的引力，但这种引力太强了，把我们重重地向后推在座位上。
pull
v．拉，拖，拔
n．拉，拖，拉力，牵引力
要
点
讲
与
练
思维拓展
要
点
讲
与
练
观察下列句中pull的词性和意思。
(1)The
tractor
pulls
well.
这台拖拉机拉力大。(v.拉)
(2)Some
advertisements
have
no
pull
at
all.
有些广告毫无吸引力。(n.吸引力)
(3)I'll
rope
my
horse
to
your
car
and
pull
you
out.
我将用绳子把我的马和你的汽车系在一起，把你拉出来。(v.拉)
要
点
讲
与
练
2．I
cheered
up
immediately
and
floated
weightlessly
around
in
our
spaceship
cabin
watching
the
earth
become
smaller
and
the
moon
larger.(p.31)
随即我高兴起来，由于失重我在太空舱里飘来飘去，我望着地球越来越小，而月球越来越大。
?词语链接
cheer
vt.&
vi.(使)高兴、振奋；(对)欢呼
cheerful
adj.高兴的
cheerless
adj.不高兴的
cheer
sb.on为某人加油
cheer
sb.
up使某人更高兴或更快活
The
crowd
cheered
loudly
as
the
Queen
appeared.
要
点
讲
与
练
要
点
讲
与
练
女王出现时群众高声欢呼。
He
was
greatly
cheered
by
the
news.
他听到这个消息非常高兴。
要
点
讲
与
练
即学即练
用cheer的短语或其适当形式填空。
(1)Your
visit
has
greatly________him
up.
(2)The
crowd________the
runners________as
they
started
the
last
lap.
(3)You
look
as
though
you
need________up.
cheered
Cheered
on
cheering
要
点
讲
与
练
3．But
when
I
tried
to
step
forward
I
found
I
was
carried
twice
as
far
as
on
the
earth
and
fell
over.(p.31)
而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是地球上的两倍，因而我摔倒了。
要
点
讲
与
练
英语中倍数的常用表达：
(1)倍数＋as＋adj./adv.＋as 是……的几倍
My
room
is
twice
as
large
as
his.
我的房间是他的两倍大。
(2)倍数＋adj./adv.比较级＋than 比……(多/大)几倍
My
room
is
twice
larger
than
his.
我的房间比他的大两倍(是他的三倍大)。
思维拓展
要
点
讲
与
练
(3)倍数＋the＋表示长度/高度/宽度等的名词＋of是……的长度/高度/宽度的几倍
My
room
is
twice
the
size
of
his.
我房间的规模是他的两倍。
温馨提示：此结构中常用的名词有：size,
height,
weight,
length,
width,
depth等。
要
点
讲
与
练
用上述句型完成下列句子。
(1)这把尺子是那把的三倍那么长。
_________________________________________________________________________________________________________________
(2)到的学生是我们预计的五倍。
________________________________________________________________________
即学即练
This
ruler
is
three
times
as
long
as
that
one.
＝This
ruler
is
two
times
longer
than
that
one.
＝This
ruler
is
three
times
the
length
of
that
one.
There
are
five
times
as
many
students
as
we
expected.
要
点
讲
与
练
4．We
watched，amazed
as
fire
broke
out
on
the
outside
of
the
spaceship
as
the
earth's
gravity
increased.(p.31)
随着地球引力的增加，火箭外部起火了，我们看得都惊呆了。
要
点
讲
与
练
break
out
突发；爆发
break
away
(from)
突然离开；脱离；放弃(习惯等)
break
down
毁掉；制服；停顿；倒塌；垮掉；分解
break
in
闯入；打断
break
into
破门而入；侵占
break
up
打碎；拆散；(会议)结束；分裂(解体)
?词语链接
要
点
讲
与
练
break
off
中断；折断；脱落；暂停；断绝；解除
break
off
from
放弃，和……绝交
要
点
讲
与
练
选用上述词语完成下列句子。
(1)He
predicted
that
war
would______________in
the
next
few
years.
(2)You
must__________________such
bad
habits.
(3)Her
health________________under
the
pressure
of
work.
(4)Burglars(小偷)
________________while
we
were
away
on
holiday.
即学即练
break
out
broke
away
from
broke
down
had
broken
in
要
点
讲
与
练
(5)The
thieves
planned
to
________________a
bank.
(6)She
________________
a
piece
of
chocolate
and
gave
it
to
me.
(7)Don't__________________when
the
adventurer
is
telling
his
own
story.
(8)The
band
finally
________________
because
of
lack
of
money.
5．watch
out
for...(p.31)
注意
break
into
broke
off
break
in
broke
up
要
点
讲
与
练
watch
out(for)
密切注视，当心，提防
watch
for
守候，注意，监视
watch
over
看守，监视
?词语链接
要
点
讲
与
练
完成下列句子。
(1)I
advised
them
_______________(当心)
slick
spots(路滑的地方)．
(2)____________for
a
tall
man
in
a
black
hat.
(3)We
must
________________(当心火灾)．
(4)They
use
specially
trained
dogs
to__________(看守)their
sheep
at
night.
即学即练
to
watch
out
for
Watch
out
watch
for
fires
watch
over(共43张PPT)
英语·必修3(人教版)
第二学时 Learning
about
Language
Ⅰ.单词默写
课
前
热
身
根据所给英文解释写出下列单词。
1．________：very
strong
and
sudden.
2．________：to
make
sb.
feel
confused
because
they
do
not
understand
sth..
3．________：to
be
present
in
a
place
or
situation.
4．________：causing
harm.
5．________：an
idea
or
opinion.
violent
puzzle
exist
harmful
theory
课
前
热
身
6．________：different
from；not
similar
to.
7．________：as
a
result
of
sth.,
therefore.
8．________：a
set
of
ideas
or
theories
or
a
particular
way
of
doing
sth..
unlike
thus
system
Ⅱ.短语熟记
课
前
热
身
1．________________及时，终于
2．________________下蛋
3．________________产生；分娩
4．________________轮到某人；接着
5．________________防止……受到……伤害
in
time
lay
eggs
give
birth
to
in
one's
turn
prevent...from
课
前
热
身
Ⅲ.佳句欣赏
1．______________________________until
between
4.5
and
3.8
billion
years
ago
when
the
dust
settled
into
a
solid
globe.
以后它变成什么没人知道，直到38～45亿年前，这团尘埃才慢慢形成一个固体的球状物。
2．______________________________water
was
to
be
fundamental
to
the
development
of
life.
What
it
was
to
become
was
uncertain
It
was
not
immediately
obvious
that
课
前
热
身
水对生命的发展起到关键作用，这一点当时并不明显。3．This
produced
a
chain
reaction，____________________________for
life
to
develop.
这就产生了一系列的反应，使得生命就有可能开始发展了。
which
made
it
possible
要
点
讲与练
1．However，according
to
a
widely
accepted
theory，the
universe
began
with
a
“Big
Bang”
that
threw
matter
in
all
directions.(p.25)
然而，一种普遍为人们所接受的理论是：宇宙起源于一次大爆炸，这次大爆炸将物质投射到四面八方。
词语链接
要
点
讲与练
begin
with＝start
with
以……开始；由……作为开头
to
begin
with
首先，第一点
即学即练
要
点
讲与练
选用上述词语完成下列句子。
(1)The
proceedings
will________________a
speech
to
welcome
the
guests.
(2)The
party
____________
a
song.
(3)________________，we
must
consider
the
problem
all
sidedly.
begin
with
began
with
To
begin
with
要
点
讲与练
2．They
were
in
time
to
produce
carbon
dioxide，nitrogen，water
vapour
and
other
gases.(p.25)
它们最终产生了二氧化碳、氮、水蒸气和其他气体。
词语链接
要
点
讲与练
in
time.及时；终于；迟早
at
one
time
曾经，一度
at
times
有时，间或
at
a
time
一次，依次
in
no
time
几乎，马上地，立刻
on
time
准时；曾经
ahead
of
time
提前
要
点
讲与练
for
the
time
being
暂时
from
time
to
time
不时地
at
the
same
time
同时，但是
即学即练
要
点
讲与练
用上述短语完成下列句子。
(1)They
sent
the
mail
to
me
just____________，before
I
left.
(2)William
arrived
at
the
theatre
just______________for
the
play
was
to
be
on.
(3)Hurry
up!
The
concert
will
begin_____________________________________________
in
time
in
no
time
in
time
要
点
讲与练
(4)________________________will
I
give
up.
(5)The
boy
laughed
and
cried________________________________________________________________________.
(6)________________________he
was
addicted
to
playing
web
games,
but
now
he
devotes
himself
to
writing,
which
delights
his
parents.
At
no
time
at
the
same
time
At
one
time
要
点
讲与练
(7)Don't
try
to
do
everything
at
once,
take
it
a
bit____________________．
(8)You'll
have
your
own
office
soon,
but__________________________you'll
have
to
share
one
with
me.
(9)We're
determined
that
the
work
shall
be
finished________________(提前)．
at
a
time
for
the
time
being
ahead
of
time
要
点
讲与练
3．Water
had
also
appeared
on
other
planets
like
Mars
but
unlike
the
earth，it
had
disappeared
later.(p.26)
水也出现在像火星那样的其他行星上，但和地球不同，其他行星上的水后来都消失了。
要
点
讲与练
词语辨析：unlike，dislike
①unlike(不像)是介词
like
(像)的反义词。
②dislike(不喜欢)是动词like(喜欢)的反义词。
A
person，unlike
a
machine，is
not
replaceable.
人和机器不同，是不可替代的。
He
dislikes
dogs.
他不喜欢狗。
?即学即练
要
点
讲与练
根据句子的意思在括号里填入适当的词。
(1)A
good
hotel
manager
should
know
his
regular
guests'
likes
and________．
(2)Her
latest
novel
is
quite________her
earlier
work.
(3)If
you
go
on
like
that
you'll
get
yourself________(like)．
(4)I
was
very
interested
in
the
lecture，________many
of
the
students.
dislikes
unlike
disliked
unlike
要
点
讲与练
4．What
many
scientists
believe
is
that
the
continued
presence
of
water
allowed
the
earth
to
dissolve
harmful
gases
and
acids
into
the
oceans
and
seas.(p.26)
许多科学家认为水的长期存在使地球得以把有害的气体和酸溶解在海洋里。
?词语链接
要
点
讲与练
harmful
adj.有害的，伤害的
harm
v．&n.伤害
harmfully
adv.伤害地
harmless
adj.无害的
harmlessly
adv.无害地
be
harmful
to
对……有害
要
点
讲与练
do
harm
to对……有害
do
sb.harm对某人有害
come
to
harm受到损害
come
to
no
harm未受到伤害
即学即练
要
点
讲与练
选用上述词语完成下列句子。
(1)It's________to
your
eyes
to
read
in
the
bus.
(2)Drunkenness(醉酒)______________our
health.
(3)Nuclear
power(核能)
will______________our
health
and
safety
if
improperly
used.
(4)They
had
done
their
best
to
harmful
is
harmful
to
do
harm
to
要
点
讲与练
__________________________________(防止小孩们受到任何伤害)．
5．They
produced
young
generally
by
laying
eggs.(p.26)
它们通常是通过孵蛋来繁殖后代的。
lay
vt.(laid,
laid,
laying)
把放下；摆设；铺(地毯)；产(蛋)
prevent
children
from
any
harm
词语链接
要
点
讲与练
lay
eggs
下蛋
lay
sth.aside
把某物放在一边；积蓄(钱)
lay
sth.down
把某物放下
lay
the
blame
on
sb.责备某人
lay
the
table
摆桌子
lay
emphasis/stress
on
sth.把重点放在某事上
要
点
讲与练
He
laid
his
hand
on
my
shoulder.
他把手放在我的肩上。
Who
should
we
lay
the
blame
on?
我们该责备谁？
即学即练
要
点
讲与练
根据句子的意思在括号里填入适当的词语。
(1)The
bird________its
eggs
in
other
birds'
nests.
(2)He
is
a
political
leader
that________________________________(非常强调)
individual
responsibility.
(3)He________some
money________for
rainy
days.
lays
lays
great
stress
on
Lays
aside
要
点
讲与练
6．They
laid
eggs
too
and
existed
on
the
earth
for
more
than
140
million
years.(p.26)
它们也生蛋，在地球上生存了1.4亿年。
?词语链接
要
点
讲与练
exist
vi.存在；生存
existence
n．存在
exist＋prep.存在于地方
exist
on
sth.靠某物生存
Does
life
exist
on
Mars?
火星上有生命吗？
I
can
hardly
exist
on
the
wage
I'm
getting.
我靠我挣的工资简直难以糊口。
即学即练
要
点
讲与练
用exist的短语或其适当形式填空。
(1)This
plant________only________Australia.
(2)Can
you________________such
a
low
salary?
(3)I
doubt
the________(exist)
of
alien.
7．Thus
they
have，in
their
turn，become
the
most
important
animals
on
the
planet.(p.26)
于是，他们接着成为这个行星上最重要的动物。
Exists
in
exist
on
to
existence
要
点
讲与练
in
one's
turn
轮到某人；接着
in
turn轮流；一个接着一个
by
turns轮流；一阵……一阵……
take
turns
(to
do
sth.)轮流(做某事)
It's
one's
turn
to
do
sth.轮到某人做某事了
It's
your
turn
to
clean
the
classroom.
轮到你打扫教室了。
词语链接
要
点
讲与练
即学即练
用上述短语完成下列句子。
(1)She
went
hot
and
cold________________．
(2)In
our
class，each
student's
recitation
comes________________(轮流)．
(3)They，_______________，made
a
proposal.
(4)Each
of
you
must______________________________(依次发言)．
by
turns
by
turns/in
turn
in
their
turn
take
turns
to
make
a
speech
要
点
讲与练
8．How
life
began
on
earth
is
one
of
the
biggest
puzzles
that
scientists
found
hard
to
solve.(p.27)
生命到底是如何开始的是科学家们觉得最难解决的难题之一。
要
点
讲与练
?词语链接
puzzle
n．难题
v．迷惑
puzzlement
n．迷惑
puzzled
adj.感到困惑的
puzzling
adj.使迷惑的
be
puzzled
about
对……感到疑惑
要
点
讲与练
?即学即练
选用上述词语完成下列句子。
(1)To
explain
the________findings,
he
offers
two
theories.
(2)I________________that
I
haven't
heard
from
Tom
for
so
long.
(3)She
listened
with
a________
expression
on
her
face.
(4)No
one
has
yet
succeeded
in
explaining
the________of
how
life
began.
puzzling
am
puzzled
puzzle
puzzled
要
点
讲与练
was
puzzled
What
puzzles
me
要
点
讲与练
要
点
讲与练
此句为主从复合句。主语为主语从句，从句由连词whether
引导，不定式to
come作years的定语。whether
this
problem
can
be
solved是depend
on的宾语从句。
要
点
讲与练
?即学即练
将下列句子译成英语，并分析其结构。
(1)使我兴奋的是，父亲给我买了一辆单车。
____________________________________________________________________
要
点
讲与练
(2)我是否离开这家公司去深圳取决于老板怎样对我。
________________________________________________________________________
__________________________________________________
