Ⅲ. 根据三亚与海口之间的不同出行方式，用单词的适当形式填空。

1. Taking a high-speed train is (fast) than taking a coach.
2. Taking a coach is (cheap) than taking a high-speed train.
3. Taking a high-speed train is (expensive) than taking a coach.
4. Taking a high-speed train is as (comfortable) as taking a coach.

1. faster
2. cheaper
3. more expensive
4. comfortable

本题考查形容词比较级和固定结构as...as的用法：
1. 句中出现标志词than（比），需使用形容词fast的比较级，结合表格信息高铁耗时更短，fast的比较级为faster。
2. 句中出现标志词than，需使用形容词cheap的比较级，结合表格信息大巴票价更低，cheap的比较级为cheaper。
3. 句中出现标志词than，需使用多音节形容词expensive的比较级，结合表格信息高铁票价更高，expensive的比较级为more expensive。
4. 固定结构as + 形容词原级 + as 表示“和……一样”，此处直接填形容词原级comfortable即可。

Ⅳ. 短文填空。
从方框中选择合适的单词并用其适当形式填空，每词限用一次。

In our world, there are many amazing animals. From baby fish to big whales, animals are 1. important part of the world. But many animals are in danger. Many people are destroying(毁坏）animals’ homes by 2. down trees. So we should 3. these animals.
4. is it important to protect animals? Firstly, animals play an important part in keeping the ecosystem(生态系统）5. . If we don’t protect these animals, the result will be bad. Secondly, many animals are important to many different 6. around the world. For example, elephants are a symbol of good luck in Thai culture.
We can start to protect animals by learning about 7. living habits. We shouldn’t hurt them. Instead, we should be 8. to them. So we should take action(采取行动）to protect animals. For example, workers in the zoo should ask visitors to 9. the rules when they are in the zoo. The government(政府）also 10. to take action. For example, it can make laws(法律）to protect animals and tell people the importance of protecting animals.

1. an
2. cutting
3. save
4. Why
5. balanced
6. cultures
7. their
8. friendly
9. follow
10. needs

1. 此处表示“世界的一个重要组成部分”，important以元音音素开头，需将方框内的不定冠词a变为an，修饰可数名词单数part。
2. by是介词，后面要接动名词，cut down是固定短语意为“砍伐”，因此将cut变为cutting，表达通过砍伐树木毁坏动物家园的含义。
3. should是情态动词，后面接动词原形，句意为“所以我们应该拯救这些动物”，填save。
4. 根据后文对保护动物重要性的两点阐述，此处是提出问题“为什么保护动物很重要？”，填疑问词Why，句首首字母大写。
5. 固定结构keep sth+形容词表示“使某物保持某种状态”，此处指保持生态系统平衡，直接填balanced。
6. different后面接可数名词复数，此处指世界上许多不同的文化，因此将culture变为复数形式cultures。
7. 句意为“我们可以通过了解它们的生活习性开始保护动物”，此处要修饰名词living habits，需将主格代词they变为形容词性物主代词their。
8. 固定搭配be friendly to... 意为“对……友好”，直接填friendly。
9. 固定搭配ask sb to do sth意为“要求某人做某事”，follow the rules是固定短语“遵守规则”，填follow。
10. 主语the government是单数，句子为一般现在时，谓语动词要用第三人称单数形式，need to do sth意为“需要做某事”，因此将need变为needs。