题目内容
If you are interested in sea creatures,you don't have to go to swim in the sea. You can enjoy underwater life in 1 way―by visiting an aquarium.
Experts do not know 2 people began keeping fish as pets. The Chinese kept and studied carp and goldfish over one thousand years ago. The ancient Romans kept eels. And the Greeks made the first study of sharks and dolphins. By the middle of the 1800s,science 3 (show) that plants,fish and other sea creatures could survive together under water. So it was no 4 necessary to change the water in a tank for fish to live there. This led to the building of the first public aquarium.
Today,millions of people visit aquariums in more than thirty countries. An official of Maryland says his organization 5 (approve) fortyone aquariums in the USA in the past few decades. One of 6 (famous) aquariums is in Monterey,California. All over the world,it 7 (recognize) as the finest one. It was in a building that 8 to be a cannery. This was 9 workers prepared fish and placed them in cans to be sold.
What's more,the Monterey Bay Aquarium is caring about twentynine penguins,which are kept until they are ready 10 (return) to the nature reserve.
1. 2. 3. 4. 5. „
6. 7. 8, 9. 10.
1. another 2. when 3. had showed 4. longer 5. has approved 6. the most famous 7. has been recognized 8. used 9. where 10. to be returned