20．When people want to know about the weather，they usually go to there radios，TVs，newspapers，or to the Internet．However，you can also find many weather signs among wildlife，because of their highly developed senses．Drops in air pressure（壓力） produce an effect on small animals in many ways．Mice and deer are good weather indicators．People who spend a lot of time outdoors have observed that，before a storm，field mice come out of their holes and run around，Deer leave high ground and come down from the mountains．
Birds are especially good weather indicators because they also show the effect of a pressure drop in many ways．For example，some birds become irritable（急躁的）and quarrelsome and will fight over a price of bread．Other birds chirp（嘰嘰喳喳）and sing just before a storm．It seems they know they won't get another chance for an hour on two．Birds also seek safe places before a storm，You will sometimes see birds settling in trees or gathering together on a wire close to a building．Pre-storm low pressure makes the are so thin that birds have difficulty flying．
It is unusual to see many birds flying overhead in the summertime，rather than during the periods in the spring or autumn．Watch for other weather signs if you see this．If they fly in the wrong direction，they may be flying ahead of a storm．
By paying closer attention to some important signs in nature，we can become better prepared for any kind of weather．
32．The word"indicators"in paragraph I probably meansC．
A．maps B．services
C．signs D．stations
33．There will be a storm if birdsA．
A．make more noise than usual
B．fly in different directions
C．come down from tall trees
D．share a piece of bread
34．How can birds sense the coming of a storm？C
A．By feeling a drop in air temperature．
B．By noticing the change of wind directions．
C．By feeling a drop in air pressure．
D．By noticing the movements of other animals．
35．The best title for the text would beD．
A．Signs of a Storm
B．Drops in Air Pressure
C．Animals'Sharp Senses
D．Nature's Weather Signs．
分析 本文屬于說明文閱讀，作者通過這篇文章主要向我們描述了當暴風雨即將來臨時動物的各種異常表現(xiàn)，告訴我們怎么學會從生活中觀察動物行為的變化來預(yù)知天氣的變化．
解答 32-35CACD
32 C 詞義猜測題．根據(jù)第一段最后People who spend a lot of time outdoors have observed that，before a storm，field mice come out of their holes and run around．Deer leave high ground and come down from the mountains，可判斷出indicators的意思是"指示者；指示物"；故選C．
33 A 細節(jié)理解題．根據(jù)第二段中的"…and sing just before a storm．"可判斷出當暴風雨來臨時，鳥會發(fā)出比平常更加多的嘈雜聲；故選A．
34 C 細節(jié)理解題．根據(jù)第二段中的"Pre-storm low pressure makes the air so thin that birds have difficulty flying．"可判斷出鳥通過感覺空氣氣壓下降而感覺到暴風雨即將來臨；故選C．
35 D．推理判斷題．這篇短文講述了當暴風雨即將來臨時動物的各種異常表現(xiàn)，由此人們可以通過觀察這些異常表現(xiàn)而得出暴風雨即將來臨的結(jié)論，所以這篇短文最好的題目是：Nature's Weather Signs；故選D．
點評 做閱讀理解時要快速的瀏覽全文，把握文章主旨大意，帶著問題回到原文，尋找細節(jié)或概括相應(yīng)的答案，最后要理清作者寫作思路．
