Ⅳ. 语法填空
（改编自WY七上U6课文）
The new camera looks like a real beaver! We put it by the river. Now we 1. (watch) the beavers. Look! One beaver 2. (cut) a tree with its teeth. And the other two 3. (put) the sticks in the river. They want to make a pool. But what's it for? Oh, I see! They 4. (build) their home in it. The pool will protect them from wolves, foxes, etc. This is amazing!
Now the work is done! Two beavers 5. (swim) in the pool. The other one 6. (try) to find food. It's such nice work. No wonder beavers are called "nature's engineers"!

【语篇导读】本文是一篇记叙文,围绕"河狸筑巢"这一自然场景展开叙述,生动描绘了河狸协作筑造池塘、打造家园的过程,并点明了河狸被称为"大自然的工程师"的原因。
1. are watching 句意:现在我们正在观察这些河狸。时间标志词Now提示动作正在进行,句子时态须用现在进行时。主语we为复数,be动词用are;动词watch的现在分词是watching,因此填are watching。
2. is cutting 句意:看!一只河狸正在用它的牙齿啃一棵树。"Look!"是现在进行时的标志性提示词,表明动作正在发生,句子时态须用现在进行时。主语One beaver是单数,be动词用is;动词cut的现在分词是cutting,因此填is cutting。
3. are putting 句意:另外两只正把树枝放进河里。本句与前句并列,也应用现在进行时。主语the other two是复数,be动词用are;动词put的现在分词是putting,因此填are putting。
4. are building 句意:它们正在里面建造它们的家。"Oh, I see!"表明说话人此刻理解了正在发生的动作,句子时态须用现在进行时。主语They是复数,be动词用are;动词build的现在分词是building,因此填are building。
5. are swimming 句意:两只河狸正在池塘里游泳。"Now the work is done!"表明此处是工程完成后正在进行的动作,句子时态须用现在进行时。主语Two beavers是复数,be动词用are;动词swim的现在分词是swimming,因此填are swimming。
6. is trying 句意:另一只正试着寻找食物。本句与前句并列,描述此刻正在进行的动作,句子时态须用现在进行时。主语The other one是单数,be动词用is;动词try的现在分词是trying,因此填is trying。

Ⅴ. 阅读理解
Whales look like the biggest fish in the world, but they are not fish. They belong to mammals(哺乳动物), like dogs and cats. People are mammals too. Most mammals do not lay eggs. They give birth to(生) babies and feed them milk.
Whales are very big. They breathe with their lungs. They swim in oceans all over the world. They have large brains and live in family groups. The largest type of whale is the blue whale. It grows to be about 100 feet long and weighs(重) about 200 tons!
Do you know how whales get their names? Most whales are named after how they look. The humpback whale(座头鲸) is named after its humped back.
Whales use sound to sing and hunt. The sound can help whales find other marine life(海洋生物) and tell the direction. For example, they send out a sound and then listen. The sound waves come back and give them a picture of the things around them.
1. About mammals, which of the following is NOT true according to the passage?
A. Most mammals lay eggs.
B. People are mammals.
C. Most mammals have live babies.
D. Most mammals feed babies milk.
2. After reading the second paragraph, we can know .
A. the blue whale weighs about 100 tons
B. whales live in family groups
C. the blue whale grows to be about 200 feet long
D. whales don't have lungs
3. The humpback whale is named after .
A. its sound
B. its weight
C. its length
D. its look
4. The sound that whales make can help them .
A. swim faster
B. breathe well
C. find other fish or animals
D. attract other fish
5. What's the main idea of the last paragraph?
A. It's about blue whales.
B. It's about what mammals are like.
C. It's about how whales get their names.
D. It's about the use of the sound made by whales.

【语篇导读】本文是一篇说明文,主要介绍了鲸的特征、名字来源以及它们的生活习性。
1. A 细节理解题。根据"Most mammals do not lay eggs."可知,哺乳动物不能下蛋。
2. B 细节理解题。根据"They have large brains and live in family groups."可知,鲸以家族群体的形式生活。
3. D 细节理解题。根据"The humpback whale is named after its humped back."可知,座头鲸因其隆起的背部而得名,属于以外形命名。
4. C 细节理解题。根据"The sound can help whales find other marine life and tell the direction."可知,鲸发出的声音能帮助它们找到其他海洋生物并辨别方向。
5. D 段落大意题。通读最后一段可知,最后一段主要讲的是鲸是如何使用声音的。