二、从方框中选出恰当的单词并用其适当形式填空。
curious dive cost explorer traveller
natural northern submersible cliff measure
1. After the long journey, the were in poor physical condition.
2. It is one of the greatest wonders in the world.
3. The part of the country is hotter than the western part.
4. Scientists used a deep-sea to explore the ocean.
5. In 2020, explorers to the Mariana Trench and set a record.
6. We must protect our workers' safety at all .
7. The used special tools to measure the depth of the cave.
8. Climbing that is riskier than climbing the hill behind it.
9. Scientists need to the amount of freshwater in the lake accurately.
10. She was the most person in the team, always asking questions about the strange rocks.

1. travellers 2. natural 3. northern 4. submersible 5. dived 6. costs 7. explorers 8. cliff 9. measure 10. curious

1. 句意为长途旅行后，旅行者身体状况差，主语需用复数名词，故填travellers；2. 此处修饰名词wonders，用形容词natural（自然的），构成固定搭配natural wonders（自然奇观）；3. 此处修饰名词part，用形容词northern（北部的）；4. deep-sea submersible意为深海潜水器，符合句意；5. 由时间状语In 2020可知用一般过去时，dive的过去式为dived；6. at all costs是固定短语，意为不惜一切代价，故填costs；7. 句意为探险家用特殊工具测量洞穴深度，主语需用复数名词explorers；8. 句意为爬那个悬崖比爬后面的山危险，填名词cliff；9. need to后接动词原形，measure意为测量，符合句意；10. 此处修饰名词person，用形容词curious（好奇的）。

三、根据汉语提示完成句子。
1. 山坡上的草在雨季过后通常会长得更绿。
The grass on the hillside usually after the rainy season.
2. 阳光如同金子般明亮地照耀在山峦之上。
The sunlight is shining gold over the mountain.
3. 安赫尔瀑布是世界上最高的瀑布之一。
Angel Falls is one waterfalls in the world.
4. 我们决定为未来保护这些美丽的森林。
We're these beautiful forests for our future.
5. 那些消防员上个月冒着生命危险从野火中拯救森林。
The firefighters to save forests from wildfires last month.

1. grows greener；2. brightly like；3. of the highest；4. deciding to protect；5. risked their lives

本题考查八年级英语Unit4的词汇、短语及语法运用，具体如下：
1. 主语the grass为不可数名词，一般现在时谓语用三单形式，“长得更绿”对应grows greener；
2. 用副词brightly修饰动词shining，like表示“像”，对应brightly like；
3. 固定搭配one of + the + 形容词最高级，“最高的”为highest，对应of the highest；
4. 现在进行时结构be + doing，decide to do sth为固定搭配，对应deciding to protect；
5. 由last month可知用一般过去时，“冒着生命危险”对应risked their lives。