Male lions are rather reserved about expending their energy in hunting. More than threequarters of kills are made by lionesses. Setting off __1__ dusk on a hunt, the lionesses are in __2__, tensely scanning ahead, the young lions fall playfully behind, and the __3__ bring up the rear, walking slowly, their massive __4__ nodding with each step as if they __5__ with the whole matter. But __6__ may have survival value. __7__ lionesses busy hunting, the males __8__ as guards for the young , __9__ them particularly from hyenas (袋狼).
Hunting lionesses have learnt to __10__ advantage of their environment. Darkness __11__ them with cover, and at dusk they __12__ wait near animals they want to kill __13__ their outlines blend into the surroundings. Small prey(猎物)present lions with no __14__. They are simply grabbed with the paws. A__15__ technique is used with __16__ animals, such as wildebeest(角马). Usually a lioness pulls her prey down __17__ running up behind __18__, and then seizes it __19__ the throat. Or she may place her mouth over the muzzle ( 动物 之鼻口) of a downed animal, __20__ it.
1. A) at B) on C) in D) under
2. A) sight B) front C) place D) part
3. A) young B) females C) males D) old
4. A) legs B) heads C) bodies D) tails
5. A) were bored B) bored C) were boring D) were to bore
6. A) swiftness B) laziness C) playfulness D) cleverness
7. A) With B) From C) For D) Over
8. A) tolerate B) vary C) function D) require
9. A) protecting B) hiding C) rescuing D) separating
10.A) catch sight of B) take advantage of C) find fault with D) give rise to
11. A) provides B) gives C) affords D) prepares
12. A) frequently B) continuously C) repeatedly D) constantly
13. A) although B) if C) until D) since
14. A) problem B) business C) matter D) doubt
15. A) common B) various C) different D) similar
16. A) small B) large C) wild D) weak
17. A) before B) after C) from D) until
18. A) her B) it C) them D) him
19. A) at B) with C) by D) of
20. A) killing B) kill C) to kill D) killed