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　　Water is “life” of our earth. It's in every living thing. It is in the air. It runs through mountains and valleys. It forms（形成）lakes and oceans. Water is everywhere.

　　Nature has a great water system（系統）. Rain water finds its way to streams（溪）and rivers. Rivers lead to the ocean. At mouths of rivers, fresh water joins the salt water of the ocean.

　　Thick water steam（水蒸氣）in the air becomes clouds and clouds bring us rain. Plants and animals' lives depend on water. Where there is water, there is life. We have to clean our streams and rivers and do something against pollution（污染）because pollution does harm（有害的）to the life.

根據短文內容，選擇正確答案。

(1) We say water is “life” of our earth because ____.

[　　]

A．water is in the air

B．water can run everywhere

C．there is water in every living thing

D．where there is water, there is life

(2) According to（根據）the article, which of the following is correct?

[　　]

A．Water is in every living thing.

B．Water is everything.

C．Water forms everything.

D．Water runs through everything.

(3) According to the article, fresh water joins the salt water of the ocean ____.

[　　]

A．in the valleys

B．in the mountains

C．at mouths of rivers

D．at mouths of oceans

(4) According to the article, what do we have to do against pollution?

[　　]

A．Clean the stream.

B．Stop air pollution.

C．Prevent（阻止）the fresh water from joining the salt water.

D．Clean our streams and rivers.

答案：C;A;C;D
解析：

(1)從文章前兩句可得知。

(2)由短文第一段第2句話可知水存在于每個生物中。

(3)淡水和海水是在河流的入�？诮粎R的。

(4)最后一段最后一句話。


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