----- Nội dung ảnh ----- *Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. 13. Stilt houses are popular between different ethnic minority groups, from the Thai in the Northern Highlands A B C D to the Khmer in the Mekong Delta.
14. Tree Planting Day is very important in Singapore because the country needs to protect it's natural parks A B C D and green spaces.
15. Life in the countryside isn’t as convenient as that in the city, so I like living in the countryside permanently. A B C D
