Question

一篇英语首字母填空

In the past ten years,the number of people visiting Antarctica has doubled to 13,500.Though the .n..... is not very big,scientists worry that traveling there could bring dangers to people and the environment.
Scientists say if there was an .a..... of a ship collided with an iceberg,there would be great problems with .r..... work in the area.
So far,the effect of tourists could .b..... in foreign species to the area which could harm the environment.

Answer 1

1.number
2.accident
3.rescue
4.bring

Answer 2

1.number 数字
2.accident 事故
3.rescue 营救工作
4.bring 带来

Answer 3

number accident recent bring