Have you ever seen the advertisement: Learn a foreign language in six weeks, 1 give your money back? Of course, it 2 happens quite like that. The only language 3 to learn is the mother language. And think 4 practice is needed for that. Before the Second World War people usually learned a foreign language 5 the literature(文学) of the country. Now most people want to 6 a foreign language. Every year millions of people start learning 7 .How do they do it? Some people try at home 8 books and tapes, others go to evening classes or watch TV programs. 9 they use the language only 2 or 3 times a week, learning it will 10 a long time, like language learning at school. A few people try to learn a language fast by studying for 6 or 11 hours a day. It's much easier to learn the language in the country where it 12 . But most people are 13 to do this, and many people don't have to do so. Machines and good books will be very 14 , but they can not do the students' work. 15 the language is learned quickly or slowly, it is hard work.1).A、soB、orC、andD、but