Question

5．On a recent trip to California，I stopped by Natural Bridges，where the monarch butterflies overwinter．Many years ago，I livedclose enough to it that I could walk there regularly and study their gatherings-the most memorable experiences when living in California，This visit，however，turned out to be disappointing．Though the way to the protected monarch garden looked just as I remembered it，I spotted only a few butterflies there．So I had to drive about a mile south to Lighthouse Field a more open area visited by large numbers of bikers，dog walkers and tourists．Many monarehs-at least several hundred-gathered in a small forest of pines there．Why had they moved to this less hospitable habitat-John Dayton，a biologist from San Jose provided an answer．During the 1990s，a deadly disease killed off most large pines sheltering the monarch habitats at Natural Bridges，forcing monarchs to seek shelter elsewhere．Still，since the mid-1990s，the number of overwintering monarchs in California has declined by nearly 90 percent．Butterfly populations at Santa Paula  alone，for example，have dropped from about 120，000 to less than 1，000-the lowest figure in two decades．
In California，coastal development has reduced the area suitable for overwintering monarchs． Illegal logging，poorly regulated tourism and water withdrawals near the butterfly habitais are also  endangering the butterflies．
Throughout the butterflies'North American range，declines in milkweed plants-which monarchs need to reproduce-are also knocking down the insect's numbers．Chemicals are widely applied，wiping out the milkweed once growing in the agricultural land．
Climate change may worsen the monarchs'situation．As atmospheric levels of CO₂ continue to rise，milkweeds are likely to produce fewer toxic compounds（有毒化合物） that protect both butterflies and caterpillars （幼虫） from their enemies．Milkweed leaves also may get tougher． Caterpillars will have a harder time chewing the leaves．
66．Why did the author feel disappointed during his revisit to Natural Bridges？C
A．Because it had been overpopulated with Monarchs．
B．Because the monarch's living habit was changed a lot．
C．Because fewer monarch butterflies overwintered there．
D．Because the people there were not so hospitable as before．
67．Where did the author find those monarchs moved？A
A．Natural Bridges                  B．Lighthouse Field                  
C．San Jose                         D．Santa Paula
68．What caused a sharp decline of overwintering monarchs according to Para 3？A
A．The loss of large pines．        B．A disease of monarchs．
C．Water pollution．                D．Too many caterpillars．
69．According to the passage，the decline of the milkweeds is connected withD．
A．coastal development              B．illegal logging
C．poorly regulated tourism        D．the abuse of chemicals
70．Which diagram shows correctly how the passage is developed？（P=paragraph）D

Answer 1

分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了monarch蝴蝶从原来过冬的栖息地迁往一处噪杂的松树林里，然而这里的环境其实并不太适合它们．其中的原因有四个方面：疾病导致原栖息地的松树大多死亡，沿海开发减少了蝴蝶的栖息地，为蝴蝶繁殖所必须的一种野生植物的减少和空气中二氧化碳含量的增加．

解答 66．C．推理判断题．根据文章第一段"This visit，however，turned out to be disappointing．Though the way to the protected monarch garden looked just as I remembered it，I spotted only a few butterflies there"虽然公园的路看起来还像我记忆中那样，我发现只有少数的蝴蝶在那里，因此十分失望；故选C．
67．A．细节理解题．根据文章第一段"I stopped by Natural Bridges，where the monarch butterflies overwinter"可知作者在Natural Bridges停下是为了去看monarch 蝴蝶，因此过去作者是能在这里找到蝴蝶的；故选A．
68．A．细节理解题．根据文章第一段"a deadly disease killed off most large pines sheltering the monarch habitats at Natural Bridges，forcing monarchs to seek shelter elsewhere"可知一种致命的疾病杀死了大部分大松树，迫使蝴蝶到其它地方寻求庇护；故选A．
69．D．细节理解题．根据文章倒数第二段"Chemicals are widely applied，wiping out the milkweed once growing in the agricultural land"化学品广泛应用，消灭农业土地上的乳草属植物；可知乳草数量的减少是由于化学药品的滥用；故选D．
70．D．篇章结构题．通读全文，可知文章第一二两段讲作者去看蝴碟发现蝴蝶的数量很少，三至六段说明了导致蝴蝶减少的四个原因；故选D．

点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．