In 1986, a large iceberg called A23 broke off from an ice shelf(冰架) in Antarctica. The Soviet Union(苏联) had a research station on the shelf, and it was carried out to sea. Thankfully, no one was working there at the time.
As it moved, the iceberg broke into three smaller pieces. One of those pieces was A23a. It was about 74 kilometres long and 59 kilometres wide. That's more than three times the size of New York City. This made it the largest iceberg in the world. While the other two pieces floated away, A23a was stuck on the ocean floor(海底). It stayed there for more than 30 years.
In 2020, scientists noticed some movement in A23a. At the end of last year, the iceberg suddenly began moving faster and kept going north. Now it's floating in the open ocean.
It's rare to see an iceberg of this size on the move, so scientists are closely watching it. If it comes too close to the shore(岸), it might cause a big problem. Millions of animals live on the island. The iceberg could prevent them from getting food in the ocean.
根据短文内容,回答下列问题。每题答案不超过5个词。
1. What was on the ice shelf in 1986?
2. How many pieces did the iceberg break into when it moved?
3. How long did A23a stay on the ocean floor?
4. Where is A23a floating now?
5. What do you think of the iceberg moving?

1.A Soviet research station. 2.Three. 3.More than 30 years. 4.In the open ocean. 5.It's rare and dangerous.

根据短文意思和首字母提示,写出一个完整正确的单词。
When it comes to rabbits, we always think of their long ears. 1. B______ do you know why they have such long ears? In fact, rabbits do not have any ways to fight with their enemies. The only way that they can protect themselves is to 2. f______ the enemies quickly and run away from them.

Rabbits have long ears for two main 3. r______. With their long ears, rabbits can pick up sounds from up to three kilometres away. Most rabbits can move their ears in two 4. d______ directions. Each ear can turn up to 270 degrees. This 5. h______ them to hear the sounds from all directions. For example, when they hear the sounds of a wolf coming, the rabbits can 6. q______ run away.
Another reason why rabbits have long ears is that they need to control 7. t______ body temperature. Rabbits have many blood vessels in their long ears. When a rabbit feels 8. h______, the blood vessels will become greater in size. This allows more blood to move to its ears. As air blows over, it 9. m______ the blood cool down. Then the cool blood moves to other parts of the body 10. s______ that it feels comfortable. However, less blood moves to the rabbit's ears on cold days. This helps to keep the heat.

1.But 2.find 3.reasons 4.different 5.helps 6.quickly 7.their 8.hot 9.makes 10.so