15.There is a serious problem to our earth.That's warming.It's true that the carbon dioxide (二氧化碳)put up into the air is warming the earth.It is clear that average (平均)temperature has risen over the last century.Not everyone can believe that carbon dioxide is the main reason.A new study shows it is not all the fault (過失)of the carbon dioxide.Some scientists studied the sun and found that when the sun becomes more active,the earth warms up.When the sun quiets,temperature goes down.Some scientists aside the sun's change may be more important than carbon dioxide in warming the earth.
We can't change the sun.So in order mother to make  the earth warm up,what we can do is to control (控制)the amount of giving off carbon dioxide into the air directly (直接的).We should ride a bike or walk when we go out.It is not only good for our environment,but also good for our health.

61.What makes the earth warmer and warmer?A
A.Carbon dioxide     
B.Waste water      
C.Scientists
62.The average temperatureA over the last century.
A.has gone up     
B.has gone down     
C.has changed a lot
63.When does the earth warm up?B
A.When the sun becomes bigger.
B.When the sun becomes more active.
C.When the sun becomes quieter.
64.What can we do to the earth's warming up according to the writer?C
A.Give off less carbon dioxide.
B.Quiet the sun   
C.Ride a bike
65.Which is the best title for the passage?C
A.Carbon Dioxide    
B.Stop Giving Off Carbon Dioxide   
C.The Earth Is Warming Up.

分析 短文講了地球氣候不斷變暖,主要原因是二氧化碳的排放,也有人認(rèn)為是太陽的變化,建議我們出門時應(yīng)該騎自行車或者步行,這樣不僅保護(hù)環(huán)境,同時也有利于我們的健康.

解答 答案:61.A  細(xì)節(jié)理解題.根據(jù)第一段第一行句子that the carbon dioxide (二氧化碳)put up into the air is warming the earth.二氧化碳排入空氣使地球變暖.可知二氧化碳使地球變暖.故選A.
62.A  細(xì)節(jié)理解題.根據(jù)第一段第一行句子It is clear that average (平均)temperature has risen over the last century.很明顯平均氣溫比上個世紀(jì)上升了.可知平均氣溫比上個世紀(jì)上升了.故選A.
63.B  細(xì)節(jié)理解題.根據(jù)第一段第三行句子when the sun becomes more active,the earth warms up.當(dāng)太陽變得更加活躍時,地球溫度升高.可知當(dāng)太陽變得更加活躍時,地球溫度升高.故選B.
64.C  細(xì)節(jié)理解題.根據(jù)最后一段句子We should ride a bike or walk when we go out.當(dāng)我們出去時應(yīng)該騎自行車或步行.可知作者建議我們騎自行車.故選C.
65.C   主旨?xì)w納題.根據(jù)整篇文章內(nèi)容及其第一段句子There is a serious problem to our earth.That's warming.我們的地球有一個嚴(yán)重的問題是氣候變暖,可知文章都是圍繞地球氣候變暖展開敘述的.故選C.

點評 在通讀全文的基礎(chǔ)上,根據(jù)全文大意,展開邏輯思維,瞻前顧后,認(rèn)真觀察選項,仔細(xì)推敲,確定最佳答案.

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