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Unit4 Astronomy：the science of the stars
It's harmful to your eyes to read books in the bus.
(1)be harmful to... 对……有害
harm
n
. 损害；伤害
v
. 对……有害；伤害；损害
Nothing exists on the moon as there is no water and no air.
There exist(s)/existed... 某地有/存在……
3．
puzzle
n.
谜；难题
v
t
.&
v
i
. (使)迷惑；(使)为难
The puzzled look on her face suggested she was puzzling over the puzzling math problem.
她困惑的表情暗示了她正在思考那个令人困惑的数学问题。
(1)be in a puzzle 感到困惑；不知如何是好
puzzle about/over 冥思苦想；苦苦思索
4．
pull
n
. &
v
t
. 拉(力)；拖；牵引力
She pulled his sleeve to get his attention.
5．
mass
n.
质量；团；块；大量；(复)群众
I have masses of work to do.
Lucky for him，he was just in time for the bus.
To our great joy，my sister－in－law gave birth to a baby boy.
When it was in my turn，I was too excited to speak.
take turns to do sth/in doing sth 轮流做某事
It is sb 's turn to do sth 轮到某人做某事
4．
prevent...
(
from
) 阻止；制止
No one can prevent me(from) going there.
(1)protect...from/against... 保护……不受……侵袭
(2)同义词：stop...(from) doing...；keep...from doing...
I wrote that song just to cheer myself up.
Now that everyone is here，let's begin our meeting.
引导原因状语从句的连词：now that，since，because，as，considering (that)，in that等。
Something unexpected always breaks out in this area.
break down 打破；坍塌；(精神、身体)垮掉
break into 强行进入(某处)；突然开始(大笑、欢呼等)
You should watch out for John，who often makes fun of others.你应该提防约翰，他经常取笑别人。
1．The earth became so violent that
it was not clear whether
the shape would last
or not
.
地球(开始)变得激烈动荡，不知道这个固体形状是否会继续存在下去。
2．
What is even more important is that
as the earth cooled down，water began to appear on its surface.
更为重要的是当地球平静下来时，水开始在地球表面出现了。
3．This produced a chain reaction，
which made it possible for life to develop
.
4．So
whether life will continue on the earth
for millions of years to come will depend on
whether this problem can be solved
.
所以，在未来的数百万年中，生命能否在地球上延续取决于这个问题能否得到解决。
5．
It was not immediately obvious that
water was to be fundamental to the development of life.
水对于生命的发展会起到关键作用这一点并没有立即明朗化。
6．But when I tried to step forward，I found I was carried
twice as far as
on the earth and fell over.
而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。
短文语法填空，然后背诵短文，熟记本单元的重点词汇。
MKII，a planet__
1
__(billion) of kilometers away，is the origin of life in many
religion
s.
Physicist
s have proved the
theory
__
2
__ its
gentle
climate
and the
pull
of its
gravity
are similar to __
3
__ earth's. And
astronomer
s have found that
oxygen atom
s and
carbon dioxide
，which are
fundamental
to life，exist in its
atmosphere
through
satellite
s. __
4
__(cheer)
up
by this news，
biologist
s，in their turn，began to do some research to remove people's
puzzle
s—
Now that
there are some suitable conditions，does life really
exist
on this
globe?
Do they
multiply
by
lay
ing
eggs
or
giving birth
__
5
__ babies?
Last month，a
spaceship
__
6
__(send) there. It's a pity that this mission failed.
Unlike
the earth，MKII is a much __
7
__(young) planet.
Thus，mass
es of __
8
__(harm)
acid
clouds
float
everywhere causing
violent chain reactions
to
break out
. These clouds not only __
9
__(block)
out
the pilots' sight but also damaged the engine
system
. Luckily，the pilots
watch
ed
out
carefully and
prevent
ed the spaceship from __
10
__(crash)
in time
.
1. billions 2. that 3. the 4. Cheered 5. to
6. was sent 7. younger 8. harmful 9. blocked 10. crashing
必修3Unit4同步常考知识点练习
1．It is obvious __
what
__ the local government can do to protect the environment for future generations.
解析：
句意：为了子孙后代，当地政府在保护环境方面所能做的事情是显而易见的。It为形式主语，________ the local government can do to protect the environment for future generations是真正的主语，该主语从句缺少宾语，且表示物，故填what。
2．New technologies have made __
it
__ possible to turn out new products faster and at a lower cost.
3．All possible means __
have
_
been
_
taken
__(take) to prevent the river __
being
_
polluted
__ (pollute)．
4．If they win the final tonight, the team are going to tour around the city __
to
_
be
_
cheered
__(cheer) by their enthusiastic supporters.
5．The meeting was held in a lively atmosphere __
where
__ everybody felt to share his ideas.
解析：
考查定语从句。从句中缺少地点状语，故填where。
6．During those four years, he worked day and night, thus __
improving
__(improve) his theory gradually until it was complete.
7．Those reports included one case, __
where/in
_
which
__ a fire broke out and destroyed two cars，although there were no injuries.
8．I suppose by the time I come back in ten year's time all these old houses will __
have
_
been
_
pulled
__ (pull) down.
9．Sometimes he found __
it
__very hard to fall asleep at night, so he went to see the doctor.
10．Susan made __
it
__ clear to me that she wished to make a new life for herself.
解析：
本题考查代词的运用。句意：苏珊清楚地跟我表明她希望为自己创造新的生活。分析句子结构可以看出，该句中包含一个that引导的从句，而且根据语境可知，that从句的内容就是苏珊向我表明的事情，所以后置的that从句实际上是made的真正宾语，故用形式宾语it指代that从句。
11．The manager wants to see changes in the company, and I am sure he will __
in
__ time.
解析：
句意：经理想要看到公司的改变，我确信他迟早会看到的。in time“及时；最后，迟早”，符合题意。
12．It remains to be seen __
whether
__ the newly formed committee's policy can be put into practice.
解析：
本题考查名词性从句。句意：那仍然得看新形成的委员会政策能否付诸实践。It在此为形式主语，故seen后为真正的主语从句，又由remains to be seen可知存在不确定的意思，所以用whether是否。
13．The top leaders of the two countries are holding talks in a __
friendly
__(friend) atmosphere.
解析：
句意：两国高层领导人在友好的氛围(atmosphere)中进行谈判。
14．—Thank God you're safe!
—I stepped back, just in time __
to
_
avoid
__(avoid) the racing car.
解析：
答语句意：我退后了一步，正好避开了奔跑的汽车。in time to do sth.“正赶上做某事”。
15．It's said that the power plant is now twice __
as
__ large as what it was.
解析：
本题考查倍数的表达法。句意：据说这个发电厂现在是过去的两倍大。“倍数＋as...as”是倍数的表达法，意为“是……的几倍”，其中as...as之间要用原级。
1．An exceptionally big fire __
broke
_
out
__(爆发) at midnight.Luckily, firefighters arrived just __
in
_
time
__(及时) for the rescue.
2．Atmosphere __
blocks
_
out
__(挡住) a large amount of harmful light from space.
3．__
Now
_
that
__(既然) we have finished the design, the company, __
in
_
its
_
turn
__(轮到), will do the construction.
4．__
On
_
a
_
global
_
scale
__(在全球范围内), AIDS may well become the leading cause of infant death.
5．He, as well as his sister, __
was
_
brought
_
up
__(被抚养) in the mountainous area where education facilities are far from satisfactory.
__
It
_
is
_
suggested
_
that
__measures should be taken to prevent factories from discharging harmful gases into the air.
7．地球变暖是否加剧取决于我们的活动是否产生更多的二氧化碳。
Whether the global warming will become more serious __
depends
_
on
_
whether
__ our activities will produce more carbon dioxide.
8．大部分证据被毁了，不可能证明这种食物是有毒的了。
Most of the evidence is destroyed, __
which
_
makes
_
it
_
impossible
__to prove that the food is poisonous.
The witness's descriptions were __
too
__ unbelievable __
to
__ be of any real value.
There is nothing __
more
_
pleasant
_
than
__ a cheerful word of greeting.
1．She has got into the bad habit of reading in the bed, which is harmful for her eyes.
2．All theories come from practice and in return serve practice.
3．The twin brothers stood under the tree, puzzling and saying nothing.
4．The sun heats the earth, which makes possible for plants to grow.
5．The new stadium being built for the next Asian Games will be three times as larger as the present one.
6．You'll succeed on time because you are always working hard.
1．__
What
__is even more important is that__
as
__the earth cooled down, water began to appear on its surface.
解析：
第一空考查主语从句，从句中缺少主语，故填what；第二空考查状语从句，结合语意可知此处表示“伴随”。
2．According to a widely__
accepted
__(accept) theory, the universe began with a “Big Bang”__
that/which
__threw matter in all directions.
解析：
第一空考查非谓语动词作定语修饰theory，且accept与theory之间为被动关系，故填accepted；第二空考查定语从句，从句中缺少主语且指物，故填that/which。
3．It was not immediately obvious__
that
__water was to be fundamental__
to
__the development of life.
解析：
第一空考查主语从句，it为形式主语，that引导的从句是真正的主语；第二空考查固定短语，be fundamental to 意为“是……的基础”。
4．As a result__
of
__this, many scientists believe the earth may become too hot __
to
_
live
__(live) on.
解析：
第一空考查固定短语；第二空考查“too...to...”结构。
