Nowadays English has become an international language because it is widely used in many parts of the world. In the tendency of integration of the global economy, English is one of the effective communicative tools for everybody. The role of English is considered to be very important in the fields of economics, politics, science, culture and education. Especially, Vietnam’s official membership of WTO on 7th November 2006 opened a new door for integrating into the world economy, and more and more people want to learn English for communicating with foreign partners, tourism, and study tours, etc.