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该优化训练是针对新人教版必修3的Unit4 Astronomy：the science of the Stars出题的，主要考察学生的基础知识，从单词填空、单项选择、完型填空和阅读理解等方面进行考察，难度适中。

ⅠFill in the blank with the words we learned. Then learn the sentences well.

1 Hawking is one of the most famous ___________(physic) in the world.

2 ____________(like) China, Australia is in Winter when China is in summer.

3 The young man speaks ________(gentle) and everyone likes him.

4 There is too much ____________(violent) on TV which is bad for the health of the young.

5 Some factories produce __________(harm) gases, which pollutes our _________(大气层).

6 The __________(气候) is very pleasant in Kunming all the year round.

7 The discovery of __________(重力) is so important for science.

8 We can see live programs from America because of man-made ___________(卫星)

9 We are trying to build a better social ____________(体系).

10 Though the __________(理论) was not right, it affects many people at that time.

Ⅱ语法：主语从句(Subject Clause)：位于句首充当主语的从句。

1. ____ we'll go camping tomorrow depends on the weather.

A. If          B. Whether     C. That          D. Where

2. _____ leaves the room last ought to turn off the lights.

A. Anyone    B. The person     C. Whoever       D. Who

3. ___ Lili will get better soon is ___ her mother is worrying about now.

A. What ; what        B. Whether ; what      C. If ; that         D. What ; that

4. The reason why he was late is ___ he got up too late.

A. that         B. because     C. as         D. for

5. It's a question ____ we shall take the entrance examinations.

A. that         B. whom        C. which        D. where

6. The girl looked ___ she was worrying about her sick mother.

A. whether      B. that         C. even if    D. as if

7. ____ he always serves the people very well is known .

A. What       B. That      C. Which      D. Who

8. ___ Mary can come to the meeting is unknown.

A. Whether   B. If         C. That       D. Which

9. I want to know ___ the leather coat belongs to .

A. who       B. which     C. that        D. whom

10. --___ will get the first prize?

--I'm sure , Li Hua.

A. Who do you think            B. You think who

C. Do you think who            D. Whom do you think

Ⅲ 完型填空

The cool nights of autumn are here to___1___  us the chill of winter is not far off. Along with the cool air, the brilliant ___2___ of the summer triangle fall in the west to be replaced with a rather bland-looking region of sky. But don't___3___  initial appearances deceive you.___4___ in the fall sky are gems equal to summertime.

The Big Dipper swings low this ___5___, and for parts of the southern United States it ___6___ sets. Cassiopeia the Queen, a ___7___ of five bright stars in the ___8___ of a "W" or "M," reaches its ___9___ point overhead, the same spot the Big Dipper reached 6 months ___10___. To the east of Cassiopeia, Perseus the Hero rises high. Nestled between these two groups is the wondrous Double Cluster — NGCs 869 and 884 — a fantastic sight in binoculars or a low-power telescope.

1. A. recall            B. retell                      C. remind               D. advise

2. A. stars            B. planets                   C. satellites              D. subjects

3. A. make            B. have                      C. force                  D. let

4. A. Hidden         B. To hide                  C. Hiding                 D. Appearing

5. A. year             B. month                   C. day                    D. season

6. A . truly           B. exactly                   C. actually              D. possibly

7. A. team             B. class                     C. kind                    D. group

8. A. form            B. shape                     C. figure                  D. formation

9. A. highest         B. lowest                    C. higher                 D. deepest

10. . A. before       B. ago                        C. since                  D. later

Ⅳ 阅读理解

A

In July 1994 Jupiter, the largest planet in our solar system, was struck by 21 pieces of  comet(彗星).When the fragments(碎片)landed in the southern part of the giant planet, the explosions were watched by scientist here on earth. But what if our own planet was hit by a comet?

The year is 2094. It has been announced that a comet is heading towards the earth. Most of it will miss our planet, but two fragments will probably hit the southern part of the earth. The news has caused panic.

On 17 July, a fragment four kilometers wide enters the earth’s atmosphere with a huge explosion. About half of the fragment is destroyed. But the major part survives and hits the South Atlantic at 200 times the speed of sound. The sea boils and an enormous wave is created and spreads. The wall of water rushes towards southern Africa at 800 kilometers an hour. Cities on the African coast are totally destroyed and millions of people are drowned. The waves moves into the Indian Ocean and heads towards Asia.

Millions of people are already dead in the southern part of the earth, but the north won’t escape for long. Tons of broken pieces are thrown into the atmosphere by the explosions. As the sun is hidden by clouds of dust, temperatures around the world fall to almost zero. Crops are ruined. Wars break out as countries fight for food. A year later civilization has collapsed. No more than 10 million people have survived.

Could it really happen? In fact, it has already happened more than once in the history of the earth. The dinosaurs(恐龙)were on the earth for over 160 million years. Then 65 million years ago they suddenly disappeared. Many scientists believed that the earth was hit by a space fragment. The dinosaurs couldn’t survive in the cold climate that followed and they became extinct. Will we meet the same end?

1. Which of the following in NOT true according to the author’s description of the disaster in

2094?

A. The whole world becomes extremely cold.

B. All the coastal cities in Africa are destroyed.

C. The whole mankind becomes extinct.

D. The visit of the comet results in war.

2. Why does the author mention dinosaur at the end of the passage?

A. Because they could only live in the warm climate.

B. Because they once dominated the earth.

C. Because their extinction indicates future disasters.

D. Because dinosaurs and humans never live in the same age

3. In writing the passage, the author intends to ____.

A. give an accurate description of the possible disaster in the future

B. prove that humans will sooner or later be destroyed

C. tell the historical development of the earth

D. warn of a possible disaster in the future

4. It can be concluded that the passage is most probably part of a(n) ____.

A. horror story                                   B. news report

C. research paper                        D. article of popular science