4. ―What are they talking about?

―They are talking about       ____  (保護環(huán)境).

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A:Hi,Eric!Great news!

B:1       

A;Plastic bags thinner than 0. 025 mm will not be used in the supermarket.

B: 2      

A:It is good news because plastic bags are  bad for the environment.

B: Oh,I didn't know that. 3     

A:We can use cloth(布)bags instead of plastic ones. 

B:4     A cloth bag can be used for a long time. 5     

A;You can buy one in the supermarket. But I can give you one.

B:Thanks a lot.

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 從方框中選出合適的短語并用其適當形式填空。

cut down,come into being,die out, blow away, wash away

1. People destroyed the living conditions of animals. So some animals on the earth are      completely.

2. Trees can stop the wind from       the earth.

3. Heavy rain will       the soil soon if there are no trees.

4. A new rule will soon       to solve the problem.

5. We should plant more trees after we       some      

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3. On my way      school, I saw a beautiful bird.

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5. There are more than 3 ,000 languages spoken in the world.(對畫線部分提問)

______  ________  languages are there      in the world?

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5. Chinese is regarded      a difficult but beautiful language.

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4. They are trying to s      the message about saving the earth.

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4. Tom likes sports      his brother likes music.

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1. 當我們不用電燈的時候我們應該關閉 它們。

We             the lights when we aren't using them.

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