21. For a learner, what is the Pimsleur Method meant to develop? A. Writing and speaking. B. Listening and writing. C. Listening and speaking. D. Reading and speaking. 22. What can you achieve by trying the method for free?A. You can better enjoy your internationa travels. B. You can reach the highest foreign language level.微信公公众号 C. You can speak with foreign friends with native accents. D. You can improve your translation and respond effectively. 23. What's the main purpose of the text? A. To introduce Paul Pimsleur and his method. To explain the importance of foreign languages. C. To persuade readers to learn foreign languages. D. To advertise a method of learning foreign languages.