18.Read the passage and choose the correct answers (A, B, C or D) to fill in the blanks. As travelling becomes cheaper and more convenient, more and more people are choosing to go on vacation in another country. (29)………... abroad is a great way to experience something new and learn about another culture. If this is your first time travelling to a different country, here are some essential tips for you. First of all, you must make sure your travel documents such as passports (30)………….. valid, and take a good care of them. (31)………... going, you should research the country you're visiting. For example, you can read guidebooks, buy a map or (32)………. Travelling websites. Having local cash in hand is also essential (33)………….. credit card might not be accepted everywhere. Finally, learning some basic phrases in the local language will come in handy. 30. A. was B. were C. is D. are (25 Điểm) A B C D