Choose the best answer A, B, C or D to complete the sentences.
1. I have a test to take tomorrow morning. If I ____ free time, I ____ to Cuc Phuong National Park with you.
2. Phong Nha Cave has been regarded by the British Cave Research Association as the top cave in the world ____ its four top records.
3. After lunch, we take a short talk to the elephant camp ____ you will enjoy an exciting elephant riding.
4. The Mekong Delta is an extraordinary place that ____ international tourists.
5. The areas are very ____ for tourists who love to study and discover.
