Passage19(2013广东，B)Innatureyoumayseemanyinsects(昆虫)andanimalsofdifferentcolors.Haveyoueverwonderedwhy?Locustsaresuperdeliciousfoodforbirdsbutitisnotalwaysaneasyjobforbirdstocatchthem

　　Passage19(2013广东，B) 

　　   Innatureyoumayseemanyinsects(昆虫)andanimalsofdifferentcolors.Haveyoueverwonderedwhy?

　　   Locustsaresuperdeliciousfoodforbirdsbutitisnotalwaysaneasyjobforbirdstocatchthem.Itisneitherbecauselocustsaregoodjumpersorrunnersnorbecausetheyaresmarterthantheirenemies.Thereasonisthatthecolorsoflocustschangewiththecolorsofcrops(庄稼).Whencropsareyoung’locustslookgreen.Butwhenautumncomeslocustschangetotheyellowandbrowncolorascropsdo.

　　   Brownbearstigersandotheranimalsmovequietlythroughforests.Theycan^beseeneasilybytheirenemies.Thisisbecausetheyhavecolorssimilartothetrees.Forthesamereasonpolarbearsthatliveonalandofsnowandicearewhite.Butterfliesandbeeslivingamongtheflowersarecolorfullikeflowers.Soilinsectsaremostlydarkcoloredandtheyliveunderthesoil(土壤)inadarkandwetenvironment.Howeverinsectswithcolorsdifferentfromplantscaneasilybefoundandeatenbyothers.Soinordertosurvivetheyhavetohidethemselvesinthedaytimeandappearonlyatnight.

　　   Haveyouevernoticedsomeevenstrangeracts?Theinkfishintheseacansendoutsomeveryblackinkwhenitfacesdanger.Astheinkspreadsoveritsenemieswillfindthemselvessuddenlyinadarkworld.Atthesametimetheinkfishimmediatelyswimsaway.Thatishowitkeepsitselfsafethoughitisnotstrongatall. 

　　l.Itisnoteasyforbirdstocatchlocustsbecause      .

　　   A.locustsaregoodrunners

　　   B.locustscanjumpveryhigh

　　   C.locustsaresmarterthanbirds

　　   D.locustscanchangetheircolors

　　2.Accordingtothepassagemostsoilinsects      .

　　   A.donothavebrightcolors

　　   B.changetheircolorswiththesoil

　　   C.donotliveinadarkandwetenvironment

　　   D.eatcolorfulinsectslikebutterfliesandbees

　　3.What’sthemeaningoftheunderlinedword“survive”inthepassage?

　　   A.繁殖   B.产卵

　　   C.觅食   D.生存

　　4.Theinkfish      sothatitsenemieswillnotseeit.

　　   A.changesitscolor

　　   B.makesthewaterarounditblack

　　   C.appearsonlyatnight

　　   D.h