Many animals use camouflage （偽裝） to make them harder to see.Hunters do this so that the animals they want to eat don't see them and run away.And prey animals，such as deer and zebra，use camouflage to avoid being eaten.
   But why do large cats have such different patterns（圖案）？Lions don't have any spots at all，but cheetahs（獵豹） have small black spots and tigers have large black stripes and orange fur.
   Will Allen at the University of Bristol was interested in this question.He decided to study large cats to find out the reasons for these different patterns.To find out the answer，he also needed to talk to scientists from many different fields，such as psychology，biology，engineering and computer science.Experts from each of these areas of science helped him with his work.
   His results show that there is a clear connection between patterns and environment.Cats in forests with lots of trees and plants have more complicated （復(fù)雜的） patterns than cats which live in areas without lots of trees.And cats that spend more time in trees have more irregular（不規(guī)律的） patterns than cats that hunt at night.Will explains that a cat's camouflage depends on where it lives and how it hunts.Evolution（進(jìn)化） has created the most suitable pattern for each particular hunter.His studies mean we can look at a big cat's fur and predict its habitat and lifestyle.

（1）According to the passage，

C

C

don't use camouflage.
A．hunters
B．prey animals
C．experts
D．large cats
（2）According to Will's study，what's between patterns and environment？

B

B

A．An area.
B．A connection.
C．An evolution.
D．A strip.
（3）What does the underlined word"habitat"in last paragraph mean in Paragraph 4？

D

D

A．Pattern.
B．Spot.
C．Camouflage.
D．Environment.
（4）Which statement is TRUE？

C

C

A．Camouflage makes animals avoid seeing hunters.
B．Cheetahs and tigers have similar patterns.
C．Will got help from experts from many different fields.
D．A cat's camouflage has something to do with its food.