Every year many people in the world learn English. Some of them are young children. (17) _______ are teenagers. Many are adults. Some learn at school, and some learn in evening classes. A few learn English by (18) _______ or just by (19) _______ to the language on television or among their friends. Most people must work hard to learn English. (20) _______ do all these people want to learn English? It is difficult to answer that question. Young children learn English at school to study better at their subject. Many adults learn English because (21)______ of their useful for their work. Teenagers often learn English for their (22) ______ studies, because some of their books are written (23) ______ English at college and university. Other people learn English because they want to read English newspapers or magazines for (24) ______ and entertainment. 17. A. The others B. Others C. Another D. Each other 18. A. them B. their C. themselves D. theirs 19. A. listening B. speaking C. talking D. hearing 20. A. What B. How C. Why D. Where 21. A. they are B. it is C. there is D. of being 22. A. taller B. higher C. better D. fuller 23. A. in B. at C. by D. with 24. A. equipment B. example C. transportation D. information