All(1)_______thingsmustfighttostayalive.Theyhavetofeedonsomethingandatthesametimeavoidbeing(2)_______.Thereforetheyhavetosolvethisbigproblemofstayingaliveintheirownway.Thed

　　All(1)_______thingsmustfighttostayalive.Theyhavetofeedonsomethingandatthesametimeavoidbeing(2)_______.Thereforetheyhavetosolvethisbigproblemofstayingaliveintheirownway.Thedangerofbeingeatenintheseaisgreat.Thoseplantsandanimalsthatdosurviveusually(3)_______veryfastandingreatnumbers.

　　(4)_______seaanimalshavedefensivedeviceswhichhelpthemtosurvive.Thejellyfishhave(5)_______tentacles(触角)whichareusedforattackanddefense.Anothermethodof(6)_______whichseaplantsandanimalsuseisdisguise.Theyusuallyhavethesame(7)_______astheirsurroundings.

　　Inordertostayaliveanimalsneedtohavegoodsenses.Fisheshavesharpeyes.Almostallanimalsaresensitiveto(8)_______.Fishesjudgemovementsinthewaterby(9)_______oftheirlines.Fishesandotherseaanimalscanhearwellandmanyofthemcan(10)_______differenttypesofwarningsound.

　　1.A.living B.alive C.lively D.live

　　2.A.taken B.gotten C.haven D.eaten

　　3.A.produce B.reproduce C.run D.swim

　　4.A.Any B.Every C.Certain D.Each

　　5.A.beautiful B.short C.poisonous D.long

　　6.A.swimming B.survival C.flight D.growth

　　7.A.color B.body C.width D.length

　　8.A.runaway B.flee C.touch D.move

　　9.A.way B.means C.method D.approach

　　10.A.make B.do C.build D.produce