3. All the c　 　have been arrested and sentenced to death.

2. The government should take certain measures to protect the natural r　 .

1. The d　 　may be caused by a medical condition, or may be the result of an accident.

2. 解析:选D。细节理解题。根据文章第一段第四句“The butterflies go there each year to reproduce”可知答案。

Ⅷ. One possible version:

Dear Li Wei,

I’m sorry to hear that you’re under great pressure. But in my opinion, it’s natural that you are loaded with lots of schoolwork and are doing many activities because you’re a Senior Two student.

I think the first thing you should do is to take control of your life. Make a long-term and a short-term plan and put “must-do” jobs on a schedule. Set time limits to your work, which will help you develop a strong sense of time. You can also benefit from making full use of your spare time. Listening to English materials, memorizing words and expressions and appreciating a poem are all good choices. After studying for hours on end, try to participate in physical activities to relax. Listening to your favorite songs will reduce your anxieties. A sound sleep can increase your energy level and you will be more energetic. Last but not least, be confident in yourself and be optimistic about your future and you will be able to manage your time well.

Good luck!

Yours truly,

John

10. 解析:选B。考查情景交际。根据答语可知，此处表示“你认为那部电影怎么样？”，故选B项。

9. 解析:选C。句意为：打斗开始时，警察和记者很快就赶到了现场。on the spot是固定搭配，意为“在现场”。

8. 解析:选D。句意为：我们今晚想预订一张五人桌。preserve保护;保持;保存；stay仍然;保持；keep使继续下去；reserve预留;预订。

7. 解析:选C。keep an eye on 照看，照顾;注意；have an eye for表示“对……有鉴赏力”。

6. 解析:选C。why引导定语从句修饰先行词the reason,表示原因。

5. 解析:选B。根据used to do可知，此处应选用表示过去的时间状语。at a time 一次；at all times 一直；at the same time 同时。故只有at one time(曾经)符合句意。