阅读下面短文，把方框中的句子还原到文中，然后完成第五小题。（每题1分，共5 分）

If you look at the sky one night and see something moving and shining that you have never seen before, it might be a comet (彗星).

　　A comet sometimes looks like a star.? ____1.____ It shines from the sunlight it reflects (反射). Like the earth, a comet goes round the sun, but on a much longer path (轨道) than the earth travels.

??? If a comet isn’t a star, what is it then?

　? Some scientists think that a large part of a comet is water frozen into pieces of ice and mixed with iron and rock dust and perhaps a few big pieces of rock. ____2.______ These clouds, together with the dust, form a long tail.

Many people perhaps have seen a comet. _____3._____ .There may be millions of comets, but only a few come close enough for us to see.

An Englishman named Edmund Halley, who lived from 1656 to 1742, found out a lot about the paths that comets take through the sky.? ______4.____? . Others keep coming back at regular times. A big comet that keeps coming back was named after Halley because he was the one who worked out when it would come back again. Maybe you have ever seen Halley’s Comets because the last time it came close to the sun and the earth was in the year 1986. Then people all over the world were outside at night to look at it. You will probably be able to see Halley’s Comets when it comes near the earth again.

A. However no one knows how many comets there are.

B. Some comets move out of our sight and never come

C. Like a planet, a comet has no light of its own.

D. When sunshine melts (融化) the ice in the comet, great clouds of gas go trailing after it.

5.Which of the following is not true?

A. A large part of a comet is ice, iron and rock dust

B. Some comets keep coming back at any time

C. Halley’s Comets came back in 1986

D. Maybe many people have seen a comet

If you look at the sky one night and see something moving and shining that you have never seen before, it might be a comet (彗星).

　　A comet sometimes looks like a star. Like a planet, a comet has no light of its own. It shines from the sunlight it reflects (反射). Like the earth, a comet goes round the sun, but on a much longer path (轨道) than the earth travels.

       If a comet isn’t a star, what is it then?

　   Some scientists think that a large part of a comet is water frozen into pieces of ice and mixed with iron and rock dust and perhaps a few big pieces of rock. When sunshine melts (融化) the ice in the comet, great clouds of gas go trailing after it. These clouds, together with the dust, form a long tail.Many people perhaps have seen a comet. However no one knows how many comets there are. There may be millions of comets, but only a few come close enough for us to see.

　　An Englishman named Edmund Halley, who lived from 1656 to 1742, found out a lot about the paths that comets take through the sky. Some comets move out of our sight and never come back. Others keep coming back at regular times. A big comet that keeps coming back was named after Halley because he was the one who worked out when it would come back again. Maybe you have ever seen Halley’s Comets because the last time it came close to the sun and the earth was in the year 1986. Then people all over the world were outside at night to look at it. You will probably be able to see Halley’s Comets when it comes near the earth again.

1.A comet is like ________.

A. sun      B. moon     C. sunlight    D. the earth

2.A large part of a comet is ______.

A. water and rock

B. water frozen into pieces of ice and mixed with iron

C. ice, iron and rock dust

D. only a few big pieces of rock

3.Maybe many people _______.

A. haven’t seen any comets      B. have seen all comets

C. have seen a comet at daytime  D. have seen a comet

4.Some comets keep coming back ________.

A. at any time  B. at noon  C. at regular times  D. at daytime

5.Halley’s Comets came back _____.

A. in 1990    B. in 1980     C. in 1986      D. in 1989

完形填空。

　　How was your day off? Did you have fun camping? I didn't have a very 1 day. I visited my cousins. It 2 all day. In the morning. I stayed in the house and watched DVDs and read. In the afternoon, Uncle Martin put some of his old things 3 in the yard and had a yard sale! However, no one came to the sale because the weather was so bad. 4 , we brought our umbrellas and raincoats, 5 we didn't get wet.

At that time，this ship was the biggest and finest of a11. For it had sixteen compartments with her. If four of them were broken，she would still be able to stay on water.

Four days after she started out。while the Titanic was moving across the seas，the man on watch suddenly saw a very large iceberg(冰山)，and it was 100 meters tall. The great ship turned in time. However, before long there was a sudden sound from below. The noise was very low and nobody heard it. The captain went down and was surprised to see that five of her compartments were broken. The Titanic was going down fast.

The captain gave order to give up the ship and hundreds of people jumped into the water.

At last. Over 1500 people lost their lives because there were not enough lifeboats on the ship.

根据短文内容选择正确答案:

1. The Titanic was the name of a________.(　)

A. woman　　　　　　　　　　    B. man

C. ship　　　　　　　　　　    D. plane

2. Not a ship at that time_________.(　)

A. had compartments with her

B. sailed between England and America

C. could stay on the seas

D. was the same size as the Titanic

3. What broke five compartments of the ship?(　)

A. The low noise.

B. The large iceberg.

C. The captain.

D. The lifeboats on the ship.

4. The captain decided to give up his ship because he knew________.(　)

A. he could do nothing to save it

B. a lot of people j umpped into the water

C. icebergs were not far away

D. they could get to New York soon

5. How many people were saved in the end?(　)

A. No one.　　　　　　　　　　    B. About seven hundred.

C. More than 1500.　　　　　　　　　　    D. Half of the people.