2． Why are researchersseriously concerned with the phenomenon of colony-collapsedisorder?

　　A Because honeybees produce one-third of the foods we eat．

　　B Becausehoneybees feed on flowers．

　　C Because honeybees eat seeds of flowers．

　　D Both B and C．

　　3． What are the possible causes of colony-collapsedisorder given by the scientists?

　　A Worsening environment．

　　B Diseaseand chemicals．

　　C Dwindlingnumber of flowers around．

　　D Changes ingenes’ structures．

　　4． According to the fifth paragraph，which of thefollowing about bees’ genes istrue?

　　A Bees’ genes allow them toexpand their colonies．

　　B Bees’genes help keep them in their hives．

　　C Bees’genes make them fly from flower to flower．

　　D Bees’genes couldexplain the collapse of some colonies．

　　5． What explanation is given byJerry Hayes to the phenomenon?

　　A Farmers apply certain chemicals to killunwanted bees．

　　B The insecticide destroys the honeybee’s nervous system．

　　C The insecticide affects the honeybee’s memory．

　　D All of theabove．

　　答案與題解：

　　1． C 短文第一段的第一句和最后一句告訴我們，昆蟲學(xué)家正面臨一個不可解釋的謎。第二句解釋了這個謎，給出了答案。

　　2． A 短文第二段的第一句提供了答案。蜜蜂傳播花粉能使植物結(jié)果，因此為人類提供食物。

　　3． B 第四段的開頭是It could be thatdisease is causing the disappearance of the bees．第五段的開頭是Another cause ofcolony-collapse disorder may be certain chemicals that，這是科學(xué)家給出的兩個可能造成這種現(xiàn)象的原因。

　　4． D 第六段的句子：bees’genes could explain why some colonies have coilapsed andothcrs have not.這是選擇D的依據(jù)。選項A、B、C的內(nèi)容文章中都沒有出現(xiàn)，所以不是答案。

　　5． D 第五段描述了另一個可能的原因，即農(nóng)夫使用的殺蟲劑可能破壞了蜜蜂的神經(jīng)系統(tǒng)和記憶。所以D是正確選擇。