五、完形填空
You may think there is only sand in the desert, but it is not true. In the desert, there is a little (1), but it is not good enough for most plants. Still, we can see some special plants living in the desert.
There are (2) in some places in the desert. We call these places oases (绿洲). In the oases, there are villages and towns. People grow all kinds of crops in the fields there.
People (3) live outside the oases. They have camels, sheep, and other animals. These animals (4) the desert plants for their food and do not need too much water.
Camels are amazing animals. They are called "the ships of the desert". They can go for a long time without drinking water. Their humps can (5) fat, and when there is no food, the fat can turn into energy. Camels have long legs which help them (6) the hot sand, and their thick fur can keep them warm at night. What's more, their big and flat feet stop them from (7) in the sand.
The desert plants are important to the animals. For example, cacti (仙人掌) can store a lot of water inside. Some animals get water from eating cacti. Also, the dry and thorny bushes are food for camels. (8) the plants, many desert animals would die because of hunger and thirst.
In a word, the desert may seem like a difficult place to live, (9) the plants, animals like camels, and the people there have found ways to (10) together. It is a special world full of life's wonders.

1. A
2. D
3. A
4. A
5. A
6. D
7. D
8. B
9. B
10. C

1. 正确选项为A。根据上下文，文中提到沙漠中有一点雨水，但不足以供大多数植物生长，因此应选择“rain”（雨水）。
2. 正确选项为D。下文提到“We call these places oases (绿洲)”，绿洲必须有水，因此选择“water”（水）。
3. 正确选项为A。此处表示“也”的意思，且位于句中，因此选择“also”。
4. 正确选项为A。文中提到这些动物以沙漠植物为食，因此选择“feed on”（以……为食）。
5. 正确选项为A。根据上下文，骆驼的驼峰可以储存脂肪，因此选择“store”（储存）。
6. 正确选项为D。文中提到骆驼的长腿帮助它们远离热沙，因此选择“keep away from”（远离）。
7. 正确选项为D。文中提到骆驼的大而平的脚可以防止它们陷入沙中，因此选择“sinking”（陷入）。
8. 正确选项为B。文中提到没有这些植物，许多沙漠动物会因饥饿和口渴而死亡，因此选择“Without”（没有）。
9. 正确选项为B。文中提到沙漠看似难以生存，但植物、动物和人找到了共存的方式，因此选择“but”（但是）。
10. 正确选项为C。根据上下文，此处表示植物、动物和人找到了“生活”在一起的方式，因此选择“live”（生活）。

六、首字母填空
The water cycle is super-important for life on Earth. It never (1). There are some main steps. First, there is evaporation. The sun makes the water in oceans, lakes, and rivers (2). The water becomes water vapor and rises to the (3). Next is condensation. As the water vapor goes high in the sky, it gets (4) and turns into small water drops. These drops make (5). When the clouds have too many water drops, precipitation takes place. That means rain (6) from the clouds to the Earth. After that, the rainwater either goes into the (7) and becomes groundwater, (8) it runs into rivers and streams. These rivers and streams finally flow (9) to the oceans. Then the water cycle begins again. (10) about the water cycle helps us see why we need to protect our water.

1. stops
2. warm
3. sky
4. cold
5. clouds
6. falls
7. ground
8. or
9. back
10. Knowing

1. 根据上下文，水循环是持续不断的，所以第1空应填“stops”，表示水循环从不停止。
2. 太阳使得海洋、湖泊和河流中的水变暖，所以第2空应填“warm”，表示水被加热。
3. 水变成水蒸气后上升到天空，所以第3空应填“sky”。
4. 水蒸气在高空变冷，所以第4空应填“cold”。
5. 水蒸气变冷后形成小水滴，这些水滴组成云，所以第5空应填“clouds”。
6. 雨从云中落下，所以第6空应填“falls”。
7. 雨水进入地下成为地下水，所以第7空应填“ground”。
8. 雨水要么成为地下水，要么流入河流和小溪，所以第8空应填“or”。
9. 河流和小溪最终流回海洋，所以第9空应填“back”。
10. 了解水循环有助于我们理解为什么需要保护水资源，所以第10空应填“Knowing”。