Chọn một phương án A, B, C, hoặc D để điền vào chỗ trống trong văn bản sau.
ENGLISH IN TOURISM
    In today's globalized world, English plays a crucial role in the tourism industry. Tourists often rely on English to communicate (17)______ during their travels. Learning basic English phrases can significantly enhance the travel experience and make it easier to navigate new places.
    Many travel agencies provide resources (18)______ help travelers learn essential vocabulary related to tourism. These resources can include brochures, guides, and online courses that cover topics such as booking hotels, ordering food, and asking for directions.
    When traveling, it is beneficial for tourists to (19)______ their language skills by practicing with locals. Engaging in conversations not only improves their speaking abilities but also helps to create memorable experiences. (20)______ tourists are open to learning and using English, they will find that it enhances their overall travel experience.
17. A. effectively    B. effective     C. effect        D. effected
18. A. who             B. which          C. where       D. what
19. A. improved    B. improving    C. improve    D. to improve
20. A. So               B. Because    C. Although    D. If