It is a basic ability for humans to tell more from less. Surprisingly, a number of animals ______ this ability too. They will ______ more of something. Horses, for example, will go for a group of three apples instead of two apples.
This ability is ______ to animals in lots of ways. It helps them ______ the larger group of friends. Many fishes, for example, join groups for ______. If a predator (掠食动物) comes, a fish in a group of 40 is less possible to become lunch than a fish in a group of 10. So if a fish has a choice between two groups, it’s safer to join the ______ one. A sense of number even helps keep the ______. For example, a monkey group will avoid fights with other groups when they find their ______ is not an advantage.
Also, the ability to do simple ______ is a sure thing for some animals. They ______ the difference between one, two, and three.
Some others can count much higher than three.
11. A.have | B.miss | C.doubt | D.hate |
12. A.grow | B.cook | C.pick | D.leave |
13. A.fresh | B.useful | C.correct | D.direct |
14. 15. A.safety | B.holiday | C.discussion | D.exercise |
16. A.faster | B.larger | C.busier | D.quieter |
17. A.secret | B.interest | C.peace | D.record |
18. A.age | B.number | C.time | D.speed |
19. A.counting | B.jumping | C.dancing | D.swimming |
20.