Which of your hands do you use most ? Very few of us use both of our hands well. Most of us are right-handed. Only about five people out of a hundred are left-handed. New-born babies can take things with either of their hands, but in about two years they like to use their right hands. Scientists don’t know why this happens. They have studied it. They think our animal ancestors(祖先) are right-handed. This may not be true. Monkeys are our closest relations in the animal world. Scientists have found that monkeys like to use one of their hands more than the other—but it can be either hand. There are as many right-handed ones. Next time you visit the zoo, watch the monkeys carefully. You’ll see that some of them will swing(摆动)from their right hands and others will use their left hands. But most human beings(人类) use their right hands better and this makes life difficult for the left-handed ones. We live in a right-handed world.

48.Very few of us can use both of our hands well. It means ________ .

A. we can’t use one as well as the other               B.some of us can use both hands well

C. many people can use one as well as the other.  D.we can’t use both hands

49. We live in a _________ .

A. left-handed world                     B. right-handed world

C. monkey world                              D. animal world

50. Which of the following is true ?

A. Monkeys are left-handed.            B. Monkeys are right-handed

C. Some of the monkeys are left-handed, and others are right-handed.

D. There are much more right-handed monkeys than left-handed monkeys.

51. The left-handed people are difficult in life because __________

A. they can’t use their right hands at all

B. most people use their right hands better.

C. they can’t use both of their hands

D. they can’t use their left hands

Which of your two hands do you use most? Very few of us can use __1__  of our hands equally well. Most of us are right-handed. Only about five people ___2___ a hundred are left-handed. New-born babies can grasp(抓住)objects with__3____ of their hands, but in about two years they usually prefer to use their ___4___ hands. Scientists don’t know why this __5___.
Monkeys are our  ___6___  relatives(亲戚)in the animal world. Scientists have found that monkeys prefer to use one of their hands more than the ___7___  ---but it can be either hand. There are as many right-handed monkeys as left-handed___8___  . Next time you visit the zoo, ___9___  the monkeys carefully. You’ll see that some of most them will prefer to use their right hands when they swing(荡秋千), and others will use their left hands. But most human beings use their right hands better and this makes life ___10___ for those who prefer to use their left hands. In fact we live in a right-handed world.
(    )1. A. either     B. both         C. two       D. all 
(    )2. A. from      B. among       C. from among  D. out of
(    )3. A. either     B. neither       C. two       D. all
(    )4. A. two      B. both         C. right      D. left
(    )5. will happen   B. happens      C. take place  D. will take place
(    )6. A. farthest    B. furthest      C. best       D. closest
(    )7. A. other      B. right        C. left        D. two
(    )8. A. one        B. ones        C. monkey    D. people
(    )9. A. look       B. see         C. watch      D. read
(    )10.A. interesting   B. comfortable  C. easy    D. difficult