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英语完形填空What is a comet? It is a ___1___ that goes round our s

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英语完形填空
What is a comet? It is a ___1___ that goes round our sun, not in a ___2___ like the planets, but in a kind of egg ___3___ that takes it round our solar system, ___4___ in some cases perhaps even outside it, and then bake in ___5___. The nearest any comet gets to the edge of our sun during its orbits is about 145,000 kilometers. The ___6___ orbit is three years, and the longest is ___7___ to be something like a million years. There are thought to be about 120,000 comets in our solar system.
A comet has a head and one or more long ___8___. What are they ___9___? Most scientists believe they are frozen gases and dust, but ___10___ there has been another idea will be tested in future scientific research.
( )1、A、system B、body C、satellite D、zone
( )2、A、line B、triangle C、square D、circle
( )3、A、shape B、shadow C、shade D、space
( )4、A、but B、and C、or D、as
( )5、A、aboard B、away C、apart D、again
( )6、A、latest B、smallest C、shortest D、slowest
( )7、A、likely B、vital C、typical D、subtle
( )8、A、surfaces B、tails C、wings D、strings
( )9、A、made out B、made up C、made from D、made of
( )10、A、instantly B、nearly C、recently D、naturally
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