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　　19. Which of the following is mentioned as a graphic?

　　A. A letter.                B. A poem.                C. A map.            D. A name card.

　　20. The writer thinks graphics are important because ____________.

　　A. less space is taken on a page                    B. a picture is worth a thousand words

　　C. a lot of time can be saved for writers                D. many things are easier to show than to tell

　　21. When we read a graphic, we should ____________.

　　A. find out if there are any tables in it                B. put the information in the right order

　　C. count how many words there are in it                D. look at the picture and the words together

　　22. The graphic given in the passage tells us that ____________.

　　A. 5 British teenagers sleep for 8—9 hours every day    

　　B. Chinese 18-year-olds spend 5—6 hours sleeping every day

　　C. 17% of the British teenagers sleep for 3—4 hours each day

　　D. 42% of the Chinese teenagers spend 6—7 hours sleeping each day