Read the passage and choose the best answer for each question. Singapore is a small country in South East Asia. Singapore's territory consists of one main island along with 62 other islets between Malaysia and Indonesia. They together comprise an area of 682.7 sq km. That is slightly more than 3.5 times the size of Washington, DC. Singapore enjoys tropical rainforest climate. It is hot, humid and rainy most of the time. Temperatures usually range from 25 to 35 °C. There are two distinct monsoon seasons. Northeastern monsoon from December to March and Southwestern monsoon from June to September. The most common terrain is lowland. Singapore’s highest natural point is Bukit Timah Hill at 163.63 m. It has a coastline of 193 km. Singapore remains highly vulnerable to the risk of climate change especially as regards the rising sea level. ║ 16.  What does the passage mainly discuss? A. The natural resources of Singapore. B. The economic features of Singapore. C. The history of Singapore. D. The geographical features of Singapore. 17.  What does the word “They” in line 2 refer to? A. Island and islets. B. Singapore, Malaysia and Indonesia. C. Islets, Malaysia and Indonesia. D. Malaysia and Indonesia.