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Fill in each gap with one suitable word from the box(there are two extra words).
into-and-planets-universe-combined-explaining-time-were-to-that-electrons-matter |
A popular theory (1)..explaining....the evolution of the universe is known as the Big Bang Model.According to the model,at some time between ten(2)..and....twenty billion years ago,all present matter and energy(3)...were...compressed into a small ball only a few kilometers in diameter.It was,in effect,an atom(4)..that....contained in the form of pure anergy all of the components of the entire universe.Then,at a moment in(5)..time....that astronomers refer to as T=0,the ball exploded,hurling the energy(6)....into..space. Expansion occurred.As the energy cooled,most of it became(7)..matter....in the form of protons,neutrons and(8)...electrons...These original particles(9)....combined..to form hydrogen and helium,and continue to expand.Matter formed into galaxies with stars and(10)..planets...
V. Where is the box?
Choose the best answer to complete the sentence.
1. When the trucks leave the place, the ground is covered____________trash
b. on c. with d. for a. of
2. If we____________littering, the environment will become seriously polluted.
b. look for c. clean up a. pick up d. go on
3. I am not sure if Harry can go to the movie. He________have time
b. might not d. go on d. might c. must a. must not
4. She was a woman______________ I greatly respected.
a. which b. whom c. whose d. to who
5. His father helped him with his homework_________ he was tired after work.
d. because b. since c. when a. though
6.________________ is a chemical used for killing insects.
c. Pesticide d. Pertilize a. Dynamite b. Sewage
7. There is a meeting tonight,___________ ?
a. is it b. isn't it c. is there d. isn't there
8. __________using compact fluorescent bulbs to save electricity?
a. Shall we b. Why not c. What about d. I suggest
9. Now I must go____________I will be late for the last bus.
b. but a. or c. and d. so
10. "_______________ "He's tall and thin."
b. What does Nick look like? d. What does Nick do? a. How is Nick? b. Who is Nick?