The rivers will become dirtier and dirtier ______ we take action to protect them.


  1. A.
    since
  2. B.
    if
  3. C.
    until
  4. D.
    unless
D
since由于，自從……以來(lái)；if 是否，如果； until直到；unless除非，如果不。句意：如果我們不采取措施保護(hù)他們，這些河流會(huì)越來(lái)越臟。結(jié)合語(yǔ)境可知選D。
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完形填空（共15小題，每題1分，計(jì)15分）
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【小題1】
A．whichB．whoC．whomD．where
【小題2】
A．sawB．to seeC．seeingD．look
【小題3】
A．BetweenB．AmongC．InD．Beyond
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A．longB．longerC．longestD．very long
【小題5】
A．China cultureB．China culturesC．Chinese cultureD．Chinese cultures
【小題6】
A．heardB．heard ofC．hear fromD．hear of
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A．was taken placeB．was happened
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【小題9】
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【小題10】
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【小題11】
A．famous forB．famous asC．famousD．known as
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A．a(chǎn)s wellB．a(chǎn)s well asC．a(chǎn)lsoD．but
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根據(jù)短文內(nèi)容，選擇正確答案。

1.From the first paragraph, we know that people couldn’t live without _________.

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There are some easy things you can do to protect the environment and the earth. Choose ideas from the list or come up with a few of your own.

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·Keep the doors and windows closed in winter to keep warm air in.

·Give your old books and magazines to a library instead of throwing them away.

·Give your old clothes to poor children you know instead of throwing them away.

·Use both sides of paper.

·Stop pouring dirty water into the rivers or lakes nearby.

·Encourage all your friends to do the same things you do to help protect the earth. You don’t have to wait until Earth Day to do these things. Make every day Earth Day. If everyone makes a contribution to protecting the environment, the world will become much more beautiful.

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