All(1)____ things must fight to stay alive.They have to feed on something and at the same time avoid being(2)____.Therefore they have to solve this big problem of staying alive in their own way.The danger of being eaten in the sea is great.Those plants and animals that do survive usually(3)____ very fast and in great numbers.
(4)____ sea animals have defensive devices which help them to survive.The jelly fish have(5)____ tentacles(触角)which are used for attack and defense.Another method of(6)____ which sea plants and animals use is disguise.They usually have the same(7)____ as their surroundings.
In order to stay alive，animals need to have good senses.Fishes have sharp eyes.Almost all animals are sensitive to(8)____.Fishes judge movements in the water by(9)____ of their lines.Fishes and other sea animals can hear well and many of them can(10)____ different types of warning sound.
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.run away B.flee C.touch D.move
9.A.way B.means C.method D.approach
10.A.make B.do C.build D.produce
2.D固定搭配：avoid doing sth.意为“避免做某事”。
9.B固定搭配，by means of意为“用……的方法”。