听力原文：M: Tina, have you ever noticed advertisements? W: What's that? M: Some advertisements say 'Learn a foreign language in 6 weeks, or get your money back! '. W: It never happens quite like that. The only language easy to learn is the mother tongue. And think how much practice that gets! M: It is really hard to master a language. Some people try at home with books and records or tapes some use radio or television programs others go to evening classes. W: A few people try to learn a language fast by studying for 6 or more hours a day. Do you think it's a very effective way to learn a foreign language? M: I don't think so. It's clear to learn the language in the country where it's spoken. There you come into contact with it all the time. W: I can't agree with you more, but not everyone can afford this, and for many it's not necessary. M: However, foreign language, especially English, is an indispensable part of our life. People need the language to do their work better. W: You bet it. It's impossible for everyone to go abroad. And we can achieve great success as long as excellent ways are adopted. M: Besides, perseverance is very important. We should accumulate what we learn gradually and put them into practice. W: Undoubtedly, it's hard work. Machines and good books will give us some help, but they cannot replace the learner himself. What is Tina's attitude towards the advertisement?