.英語單選集考試卷模擬考試題_2

1、姓名：_ 班級：_ 學(xué)號：_-密-封 -線- .英語單選集考試卷模擬考試題考試時(shí)間：120分鐘 考試總分：100分題號一二三四五總分分?jǐn)?shù)遵守考場紀(jì)律，維護(hù)知識尊嚴(yán)，杜絕違紀(jì)行為，確保考試結(jié)果公正。1、how many things can you see in the night sky a lot! on a clear night you might see the moon, some planets, and thousands of sparkling stars. you can see even more with a telescope.but scientists belie

2、ve there are some things in the sky that we will never see. we wont see them with the biggest telescope in the world, on the clearest night of the year. thats because theyre invisible. theyre themysteriousdead stars called black holes.as a stars gases burn, they give off light and heat. but when the

3、 gas runs out, the star stops burning and begins to die.as the star cools, the outer layers of the star pull in toward the center. the star squashes (擠壓) into a smaller and smaller ball. if the star was very small, the star ends up as a cold, dark ball called a black dwarf. if the star was very big,

4、 it keeps squashing inward until its packed together tighter than anything in the universe.imagine if the earth were crushed until it was the size of a tiny marble. thats how tightly this dead star, a black hole, is packed. what pulls the star in toward its center with such power its the same force

5、that pulls you down when you jump-the force called gravity. a black hole is so tightly packed that its gravity sucks in everything-even light. the light from a black hole can never come back to your eyes. thats why you see nothing but blackness.so remember: scattered in the silent darkness are black

6、 holes-the great mystery of space.according to the article, what causes a star to die （ ）a.as its gases run out, it cools down.b.it collides with other stars.c.it can only live for about a million years.d.as it gets hotter and hotter, it explodes.2、how many things can you see in the night sky a lot!

7、 on a clear night you might see the moon, some planets, and thousands of sparkling stars. you can see even more with a telescope.but scientists believe there are some things in the sky that we will never see. we wont see them with the biggest telescope in the world, on the clearest night of the year

8、. thats because theyre invisible. theyre themysteriousdead stars called black holes.as a stars gases burn, they give off light and heat. but when the gas runs out, the star stops burning and begins to die.as the star cools, the outer layers of the star pull in toward the center. the star squashes (擠

9、壓) into a smaller and smaller ball. if the star was very small, the star ends up as a cold, dark ball called a black dwarf. if the star was very big, it keeps squashing inward until its packed together tighter than anything in the universe.imagine if the earth were crushed until it was the size of a

10、 tiny marble. thats how tightly this dead star, a black hole, is packed. what pulls the star in toward its center with such power its the same force that pulls you down when you jump-the force called gravity. a black hole is so tightly packed that its gravity sucks in everything-even light. the ligh

11、t from a black hole can never come back to your eyes. thats why you see nothing but blackness.so remember: scattered in the silent darkness are black holes-the great mystery of space.which word has the same meaning with the word “mysterious” （ ）a.ordinaryb.brightc.stranged.common3、how many things ca

12、n you see in the night sky a lot! on a clear night you might see the moon, some planets, and thousands of sparkling stars. you can see even more with a telescope.but scientists believe there are some things in the sky that we will never see. we wont see them with the biggest telescope in the world,

13、on the clearest night of the year. thats because theyre invisible. theyre themysteriousdead stars called black holes.as a stars gases burn, they give off light and heat. but when the gas runs out, the star stops burning and begins to die.as the star cools, the outer layers of the star pull in toward

14、 the center. the star squashes (擠壓) into a smaller and smaller ball. if the star was very small, the star ends up as a cold, dark ball called a black dwarf. if the star was very big, it keeps squashing inward until its packed together tighter than anything in the universe.imagine if the earth were c

15、rushed until it was the size of a tiny marble. thats how tightly this dead star, a black hole, is packed. what pulls the star in toward its center with such power its the same force that pulls you down when you jump-the force called gravity. a black hole is so tightly packed that its gravity sucks i

16、n everything-even light. the light from a black hole can never come back to your eyes. thats why you see nothing but blackness.so remember: scattered in the silent darkness are black holes-the great mystery of space.what happens after a star dies （ ）a.it becomes invisible.b.it falls to earth.c.it bu

17、rns up all of its gases.d.it becomes brighter and easier to se4、how many things can you see in the night sky a lot! on a clear night you might see the moon, some planets, and thousands of sparkling stars. you can see even more with a telescope.but scientists believe there are some things in the sky

18、that we will never see. we wont see them with the biggest telescope in the world, on the clearest night of the year. thats because theyre invisible. theyre themysteriousdead stars called black holes.as a stars gases burn, they give off light and heat. but when the gas runs out, the star stops burnin

19、g and begins to die.as the star cools, the outer layers of the star pull in toward the center. the star squashes (擠壓) into a smaller and smaller ball. if the star was very small, the star ends up as a cold, dark ball called a black dwarf. if the star was very big, it keeps squashing inward until its packed together tighter than anything in the universe.imagine if the earth were crushed until it was the size of a tiny marble. thats how tightly this dead star, a black hole, is packed. what pulls the star in toward its center with such power its the same force that p