2017-2018学年高中英语人教版必修3课时作业：Unit 4 Astronomy the science of the stars 14 Word版含答案

课时作业(十四) Unit 4 Astronomy: the science of the stars

Section Ⅱ Warming Up & Reading－Language Points

Ⅰ.单句语法填空

1．Smoking is harmful (harm) to your health, so you should give it up or at least

cut down on it.

2．There are lots of religions (religious) in the world and everyone has the right

to believe in them.

3．There are a great number of different theories (theory) about learning styles

throughout the world.

4．What makes the things worse is that he has lost his patience.

5．The new law makes it possible for us to get more chances in the country.

6．In summer the house will be too hot for the old man to_live (live) in.

7．Social attention should be paid to preventing our earth from being_polluted

(pollute)．

8．The wind was so violent (violence) that several big trees were blown down by

it.

9．Tom is unlike (like) his brother, Tony. He is outgoing, while Tony is shy.

10．The four­year­old Russian girl has drawn global (globe) attention for her

great gift for languages.

Ⅱ.阅读理解

American researchers are making final plans to send a spaceship into space for

a possible meeting with an asteroid (小行星). The spaceship is called OSIRIS­Rex.

It is six meters long and shaped like a man's bow tie (蝶形领结). The asteroid is

called Bennu. It is larger than the Empire State Building in New York City. Bennu

weighs about 60 million tons and is traveling at a speed of more than 100,000 kilometers

an hour.

The huge space rock is getting closer to Earth. It comes as close as 500,000

kilometers to the planet every six years. Researchers want to take a close look at

Bennu because it is considered one of the most dangerous asteroids in our solar system.

The American space agency, NASA, will start its research next month. The plan is to put OSIRIS­Rex in orbit (轨道) around Bennu in about two years.

The spacecraft will not land on Bennu, but will make contact (接触) with the

asteroid for about five seconds. At that time, a part of the spacecraft will gather

about 60 grams of material from Bennu's surface. All of that material will return

to the earth inside something called SRC. It is expected to land in the Utah desert

in September of 2023.

Scientists want to learn as much as possible about Bennu because of the danger

it could cause to our planet. The asteroid “has a quite high possibility of negatively

influencing the Earth” in less than 200 years, according to a NASA statement.

Another thing that makes Bennu dangerous is its path around the solar system.

That path is changing because of something called the Yarkovsky effect. The Yarkovsky

effect is what happens when a cold piece of rock gets close enough to the sun to get

heated. Scientists want to know how that warmth changes the orbit of asteroids and

other space objects.

【文章大意】 小行星Bennu每六年就离地球近50万公里，将来可能会给地球造成不良影响。

1．What do we know about Bennu?

A．It looks like a man's bow tie.

B．It is larger than New York City.

C．It travels 500,000 kilometers every six years.

D．It is getting closer to the earth each day.

解析：D 细节理解题。根据第二段的It comes as close as 500,000 kilometers to the

planet every six years.可知，这颗小行星正离地球越来越近。

2．What does the underlined part “It” in Paragraph 3 refer to?

A．Bennu's surface.

B．OSIRIS­Rex.

C．SRC.

D．The collected material.

解析：C 词义指代题。根据划线词前面的All of that material will return to the earth

inside something called SRC.以及后面的．..expected to land in the Utah desert...可知，it指代的是返回舱设备(SRC)。

3．Bennu's path is changing most probably because ________.

A．it's traveling really fast

B．it's being heated by the sun C．it's being influenced by the earth

D．it's getting colder than before

解析：B 细节理解题。根据末段的That path is changing because of something called

the Yarkovsky effect. The Yarkovsky effect is what happens when a cold piece of rock

gets close enough to the sun to get heated.可知，这颗小行星的路线改变是因为它受到太阳热量的影响。

Ⅲ.完形填空

I am an eighth­grade student at Central Middle School. In my three years at the

school I have played soccer, basketball, and baseball. I love __1__ and really enjoy

being part of a team. Playing on our school sports teams has been the __2__ part of

middle school for me. I know I'm lucky that I've had this chance.

Some kids have not been so __3__. In fact, many kids who __4__ sports don't have

the chance to play on a school team. That's __5__， to make a team, you have to try

out (参加选拔). The idea is that kids who are good at sports will do __6__ in tryouts

and make the team. __7__ what about the kids who don't do a great job during tryouts?

Maybe they are ill that day, or nervous, so they don't play their best.They don't

make the team, and that is __8__.

Also, there are kids who really don't have the __9__ to play well. They __10__