Chọn đáp án đúng. 1. Singapore is famous for its …………. and green trees. A. cleanliness B. cleanly C. cleaning D. clean 2. On Christmas Eve, most big cities are ……………. with coloured lights across the streets and enormous Christmas trees. A. decorated B. hang C. put D. made 3. In the United State, there are 50 …………… and six different time zones across the country. A. states B. nations C. towns D. countries 4. I once tried to ………… apple pie when I was in London. It was really delicious. A. do B. cook C. make D. show 5. You should go to Canada in summer because it is the most popular time for visitors to ………….. Niagara Falls and see the beautiful sights there. A. stay B. look C. tour D. visit 6. Nowadays you still see the ……….. men wear kilts (skirts) to wedding or other formal occasions. A. Scottish B. Scotland C. Scots D. Scot