unit 4 astronomy：the science of the stars（2）课时训练
1. complete the following sentences with the proper form of the given words.
development, disappoint, explode, float, force, harmful, publish, solid, spread, surface, telescope, violent
1. the butterfly _____________ its wings and moved them slowly up and down .
2. that he failed the college entrance examination ______________his parents very much .
3. she found something unusual ____________on the __________of the river, which quite frightened her.
4. the famous writer ____________a lot of popular novels in that ____________firm.
5. with the ____________of our country’s economy, people's living standard has been greatly raised.
6. now that it's so warm, we can see fishes swimming on the ___________of the pool.
7. the ____________ of gravity makes things fall to earth.
8. with a __________ kick, the robber broke into the old man's house.
9. nothing can separate the two, because they have a ____________friendship foundation.
10. during world war ii, two atomic bombs ____________in japan, killing a large number of people.
( 1. spread 2.disappointed 3. floating, surface 4. published, publishing 5.development 6.surface 7.force 8. violent 9. solid 10. exploded )
2. complete the following sentences with the proper translations.
1. when sars ______________（爆发）, fear spread out quickly all over the country.
2. try harder, and you can succeed _______________ （最终）.
3. measures should be taken to __________（阻止）the paper factory polluting the river .
4. _______________ （既然）he has admitted he's wrong, we may as well forgive him.
5. it ______________（取决于）the efforts of the government and those companies whether the environmental problem can be solved.
6. they tried their best to _______________ （使---高兴 ）those unfortunate people after the earthquake.
(1. broke out 2.in time 3. prevent 4. now that 5.depends on 6.cheer up )
3. translate the chinese into english to complete the whole sentence by using the subject clause
1. _________________________________________（太空旅行所需的）is careful preparations.
2. it will soon be announced ______________________________________________
