1. Choose the word which has a different stress pattern from the others. 9. When (thermal, land, water) pollution happens, the water temperature in streams, rivers, lakes, or oceans changes.  10. People in the countries like the USA, Great Britain, and New Zealand use English as their (official, native, foreign) language. 11. In summer, children often take part in a local or international (summer camp, game, attraction). 12. Last year I had a wonderful time at a (accents/ native speaker/ summer camp) 13. Australia is home to (special/ unique/ beautiful) animals like kangaroo and koala. 14.The Maori in New Zealand greet each other by (punching/ touching/ blowing) their noses. 15. A (flood/ tornado/ landslide) is a storm in which the air moves very quickly in a circle. 16 .In central Vietnam, serious (flood/ flooded/ floods) occur almost every year. Many houses in Quang Binh were hidden under water for many days last year