People have always communicated with __21___ . In the past when they couldn’t write ,they used simple symbols ( 记号) to send their message . Some groups of North America Indians were experts __22__ messages . For example , a small stone on top of a large one meant “ This is the way .” If there was another small stone on the right , it meant “Turn right .” Some grass with a knot ( 结)meant “ Danger ”__23__ .

    Maybe you know that in the forests of Africa , it _24___ to travel from village . But drum ( 鼓 ) __25__ from many kilometers away . So , some groups of Africans made their drums __26____ like people .

      The Incas ( 印加人 )of South America used to send messages by typing knots in a rope. Messages have been found , but __27___ can understand __28___ they mean . And the Egyptians used pictures as a kind of ___29__ but only _30____ people __31___ to understand them .

      Today , we also use __32___ . When we are in a car and we see a red light , we stop the car . When a mother says to her child ,” Eat your cake!” the child eats the cake sometimes . The red light and the words of the mother are __33___ . And it is a ___34__ that the basic means of communication between people is , of course , sounds .

      Maybe you know that there are more than __35___ languages in the world today . And about 13 of them are spoken by large groups of people . Languages of the world are both similar ( 相似) __36__ different . They are similar because we can talk and write about the same things and they are different because we talk and write about these things in __37___ ways and we use different __38___ .

       It is __39___ that we have to learn a second language _40___ communicate with people who do not speak our language .

      21. A. one other     B. each another     C. one another     D. anothers

      22 .A. at sending    B. is spreading      C. at publishing    D. is giving

      23. A. and other    B. and so on        C. and the rest     D. and like

      24 . A. used be difficult  B. used be easy  C. used to be difficult  D. used to be easy

      25 . A. will be heard  B. heard          C. could hear      D. could be heard

      26. A. “say”       B. “speak”         C. “tell ”      D. “shout ”

      27. A . anybody      B. somebody      C. everybody      D. nobody

      28. A. that           B. how           C . what’s        D. what

      29. A. hearing       B. speaking         C . writing       D . reading

      30 . A. little        B. a little           C. few          D. a few

      31. A. were learned  B. were taught    C. were teaching    D. had been learned

      32. A. a lot of symbols  B. a lots of symbols   C . lot of symbols  D . a lot of symbol

      33. A. examples     B. orders        C . language        D. symbols

      34. A. matter       B. fact           C . reality          D . situation

      35.A. 1000         B. 2000          C .3000           D. 5000

      36. A. or           B. but           C. and            D. as

      37. A. same         B. similar        C. different       D. special

      38.A. symbols       B. signs         C. expressions     D. words

      39. A. no wonder     B. not wonder    C . not matter for wonder  D. a wonder

      40. A. in order that    B. in order to     C. so that         D. so as