Ⅳ. 语法填空。
The Great Barrier Reef lies off the northeast coast of Australia. It is the 1. (large) coral reef system in the world. In fact, it takes up 2. area of 345, 000 square kilometres and 3. (include) over 900 islands. What makes it truly 4. (amaze) is that it is the only living structure on Earth that can be seen from space.
This 5. (nature) wonder is a lively underwater world. It is home to more than 1, 500 6. (kind) of fish and 400 types of coral. You can also find many rare(罕见的) animals there, such as sea turtles. The water is clear and warm, so visitors can 7. (easy) see the bright colours of the coral and the lovely fish swimming around them.
As a UNESCO World Heritage Site(联合国教科文组织世界遗产), it attracts millions of tourists every year. People come here to swim, dive or take boat trips to enjoy 8. (it) beauty. Local guides often tell visitors how important it is 9. (take) care of the sea.
Sadly, the reef is in danger. Rising sea temperatures and pollution are 10. (harm) to the coral. We must take action to protect it right now, so that future generations can also enjoy this great treasure of nature.

1. largest 2. an 3. includes 4. amazing 5. natural 6. kinds 7. easily 8. its 9. to take 10. harmful

1. 由范围限定in the world以及定冠词the可知，此处要用形容词最高级，large的最高级为largest，表示“最大的”。
2. 固定搭配take up an area of... 表示“占地面积为……”，area以元音音素开头，不定冠词用an。
3. 此处和前面的takes up是并列的谓语，主语it指代大堡礁，为第三人称单数，句子为一般现在时，所以动词include变为第三人称单数形式includes。
4. 固定结构make sth. + 形容词，此处修饰事物it（大堡礁），要用以-ing结尾的形容词amazing，表示“令人惊叹的”。
5. 此处需要形容词修饰名词wonder，nature的形容词形式是natural，natural wonder表示“自然奇观”。
6. 前面的数词1,500提示此处要用可数名词kind的复数形式kinds，1500 kinds of fish表示“1500多种鱼类”。
7. 此处需要副词修饰动词see，easy的副词形式是easily，意为“轻易地，容易地”。
8. 此处需要形容词性物主代词修饰名词beauty，it的形容词性物主代词是its，its beauty表示“它的美景”。
9. 固定句型it is + 形容词 + to do sth. 表示“做某事是……的”，此处it是形式主语，真正的主语是后面的不定式，所以填to take。
10. 固定搭配be harmful to... 表示“对……有害”，harm的形容词形式是harmful。

Ⅰ. 完形填空。
Victoria Falls is among the world's most amazing natural wonders. In November 1855, David Livingstone became the first European to see the 1. But according to some other reports, other foreigners had already 2 the falls before him. He 3 the site Victoria Falls to remember Queen Victoria, and the island nearby was named Livingstone Island in his memory.
People regard Victoria Falls as the 4 waterfall on Earth because it has the largest area of falling water in the world. Over the years, the falls have become a very 5 destination(目的地) for visitors from all over the world.
The river below the falls is a perfect place for river-boarding and white-water rafting(漂流). It is suitable for both beginners and people who have experience and are ______ 6 the activities. Each year, many visitors come to ______ 7 these exciting activities there.
Bungee(蹦极) jumpers also feel very 8 near Victoria Falls. They can 9 111 metres down from the bridge next to the falls, which was just recently known as the highest bungee jump in the world. Besides these, 10 can also enjoy bird watching, air trips, walking paths and shopping. You will surely have a great time during your trip there.
()1. A. mountains B. falls C. stones
()2. A. visited B. written C. trained
()3. A. asked B. needed C. named
()4. A. widest B. tallest C. longest
()5. A. bright B. strange C. popular
()6. A. good at B. afraid of C. sure about
()7. A. hit B. try C. express
()8. A. bored B. excited C. worried
()9. A. look B. turn C. jump
()10. A. tourists B. doctors C. scientists

1-5 BACAC 6-10 ABBCA

1. 前文开篇介绍的主体是维多利亚瀑布，此处指David Livingstone成为第一个见到该瀑布的欧洲人，选B.falls符合语境。
2. 句意为：但根据其他一些报道，在他之前已经有其他外国人游览过这个瀑布了，visited表示“游览、参观”，符合语义，选A。
3. 句意为：他把这个地点命名为维多利亚瀑布以纪念维多利亚女王，named表示“命名”，符合后文地名命名的描述，选C。
4. 后文提到它拥有世界上最大面积的落水区域，对应它是地球上最宽的瀑布，widest表示“最宽的”，选A。
5. 句意为：多年来，这个瀑布已经成为来自世界各地游客非常受欢迎的目的地，popular表示“受欢迎的”，符合语境，选C。
6. 前文说这里既适合新手，也适合有经验、擅长这些活动的人，be good at表示“擅长”，符合有经验的人的特征，选A。
7. 句意为：每年很多游客来这里尝试这些刺激的活动，try表示“尝试”，符合游客体验项目的语境，选B。
8. 蹦极是刺激的运动，蹦极爱好者在维多利亚瀑布附近会感到非常兴奋，excited表示“兴奋的”，符合语境，选B。
9. 此处描述蹦极的动作：他们可以从瀑布旁的桥上跳下111米，jump表示“跳”，对应蹦极的动作，选C。
10. 前文一直在介绍来此地游玩的访客，此处指游客还可以体验观鸟、空中旅行、徒步和购物这些项目，tourists表示“游客”，符合语境，选A。