Unit7 Protect the Earth知识点及练习
◆ 重要句型
1. We use water to clean things. 我们使用水洗东西。 解析：短语 use…to…的意思是__________________ ---- ____________________________? ---- __________________________________.
◆ 实战演练
一、用正确的介词填空。
1. We use water _________drink.
如：我们使用木头做椅子。
__________________________________________
2. Most of our energy comes from coal and oil.我们大多数能源来自煤炭和石油。 解析： 来自（两种）_________________ _______________ 如：Jack 来自美国。（两种）
______________________________ ______________________________
3. Let’s make a poster and tell them about it. 我们做张海报告诉他们关于这。
解析：短语tell…about…的意思是_________________, tell 和about后面的代词要用
______形式。
◆ 核心语法
情态动词本身有一定的词义，但不能单独使用，必须与后面的动词原形构成句子的
谓语，情态动词无人称和数的变化。常见的情态动词有：_____________________________ ___________________________________.现在一起了解下含情态动词的各种句式： 1）肯定句结构：主语+情态动词+动词原形+其他。 如：你现在应当看书了。
______________________________________________ 2）否定句结构：主语+情态动词+not+动词原形+其他。 如：我们不应该浪费能源。
_____________________________________________ 3）一般疑问句结构：情态动词+主语+动词原形+其他？ 如：---我们现在去图书馆好吗？
---好主意。
---________________________________? ----- ______________________. 4）特殊疑问句结构：特殊疑问词+情态动词+主语+动词原形+其他？ 如： ---我们现在应当做什么？
----我们现在应当等我们的爸爸妈妈。
2. Mike comes ____________the UK.
3. There is not much energy __________the Earth. 4. Reading in bed is bad __________our eyes. 5. Can you tell me something _________your school? 二、单项选择。
（ ）1.Can you draw _________Earth?
A. a
B. an
C. the
D. / （ ）2.We need a lot of _____________.
A. energy
B. energies C. a energy D. an energy （ ）3. There are ______plastic bags and bottles around us.
A. too many B. too much
C. many too
D. much too
（ ）4.---Where _______Jim _________?
---The USA. A. is; come from B. does; from
C. is; from D. does; comes from （ ）5.Doing eye exercises ________our eyes.
A. is good at B. are good at
C. is good for
D. are good for
（ ）6. We can reuse paper ________boxes.
A. make B. makes C. making D. to make
（ ）7.Earth Day is on ______________.
A. 1st April B. 22nd April C. 22nd May
D. 5th June （ ）8. Let’s meet ________the school gate.
A. in
B. on
C. at D. for （ ）9._________nice poster!
A. What
B. What a
C. How
D. How a
（ ）10. We should love ______protect our Earth.
A. and B. or C. with D. but 三、用所给单词的适当形式填空。
1. ---Is the plastic bottle _________（use）？ ---Yes, we can ___________(reuse) it.
2. We use the paper __________(make) a paper plane. 3. There ________(be) much water on Earth. 4. Sam _________(come) from the USA. 5. We clean ________(we) classroom every day. 6. There aren’t _________(some) apples in the basket. 7. Trees help ________(keep) the air clean. 8. There’s not __________(many) energy on Earth. 9. He starts __________(draw).
10.Everyone should __________(save) energy. 四、按要求改写句子。
1. You can put the poster on the wall. (改为否定句) You ________ _______the poster on the wall. 2. There is some water in the bottle.(改为一般疑问句) _______there _______water in the bottle? 3. We should plant more trees.(对画线部分提问) ________ ________ we ____________? 4. Can we cut down a lot of trees? (作否定回答) __________, _________ ___________. 5. We shouldn’t waste water.(改为同义句) We should ________water.
6. Mike is doing a poster now.(用yesterday替换now) Mike _________a poster yesterday. 五、根据中文提示完成句子。 1. 汽车使用大量的能源。
_________use ________ ________ ________energy . 2. 我们不应该使用太多的塑料袋。
We _________ ________ too _________plastic bags . 3. 我们可以使用木器制造许多东西。
We ________ ________wood ________ _________ many things . 4. 请不要扔垃圾到河里。
_______ throw the rubbish _________the __________. 5. 请捡起地上的塑料瓶。
Please _________ _______the plastic _________on the ground. 六、阅读短文。
When the weather is hot ,you go to lake or an ocean. When you are near a lake or an ocean, you feel cool. Why? The sun makes the earth hot, but it can make the water very cold. The air over the earth becomes hot, but the air over the water stays cool. The hot air over the earth goes up (升起) . Then the cool air over the water moves in and takes the place of (代替) the hot water. You can feel the wind. And the wind makes you cool.
The scientists know a lot about our planet. But there are still many answers that they do not understand.
（ ）1.In summer it’s ______near a lake or an ocean.
A. hot
B. cold
C. cool
D. warm
（ ）2.People usually like to go ______when the weather is very hot.
A. to a lake or an ocean B. to a big city C. to a small and hot city
D. into a lake or an ocean
（ ）3. The air over the earth becomes hot much faster than _________.
A. the river
B. the sea
C. that over the water
D. the air
（ ）4.Which of the following is not true?
A. The sun makes the earth hot.
B. The sun can’t make the water very cold.
C. The wind makes you cool.
D. The hot air over the water moves in and takes the place of the cold air.
（ ）5.The scientists ___________________________.
A. know nothing about our planet. B. know everything about our planet
C. know anything about our planet
D. are not sure everything about our planet.
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