Though called by sweet-sounding names like Firinga or Katrina, tropical cyclones are huge rotating storms 200 to 2,000 kilometers wide with winds that blow at speeds of more than 100 kilometers per hour (kph). Weather professionals know them as tropical cyclones, but they are called hurricanes in the Caribbean Sea, typhoons in the Pacific Ocean, and cyclones in the Indian Ocean. They occur in both the northern and southern hemispheres. Large ones have destroyed cities and killed hundreds of thousands of people.
Tropical cyclones begin over water that is warmer than 27 degrees Celsius (80 degrees Fahrenheit) slightly north or south of the earth’s equator. Warm, humid air full of water vapor moves upward. The earth's rotation causes the growing storm to start to rotate around its center (called the eye). At the certain height, the water vapor condenses, changing to liquid and releasing heat. The heat draws more air and water vapor upward, creating a cycle as air and water vapor rise and liquid water falls. If the cycle speeds up until winds reach 118 kilometers per hour, the storm qualifies as a tropical cyclone.
Most deaths in tropical cyclones are caused by storm surge. This is a rise in sea level, sometimes seven meters or more, caused by the storm pushing against the ocean's surface. Storm surge was to blame for the flooding of New Orleans in 2005. The storm surge of Cyclone Nargis in 2008 in Myanmar pushed seawater nearly four meters deep some 40 kilometers inland, resulting in many deaths.
The word "they" in paragraph 1 refers to________.
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Lời giải:
Báo saiTừ 'they' trong đoạn 1 đề cập đến________.
Theo dẫn chứng trong bài đọc: "Though called by sweet-sounding names like Firinga or Katrina, tropical cyclones are huge rotating storms 200 to 2000 kilometers wide with winds that blow at speed of more than 100 kilometers per hour (kph). Weather professionals know them as tropical cyclones, but they are called hurricanes in the Caribbean sea..." (Mặc dù được gọi bằng những cái tên nghe rất ngọt ngào như Firinga hay Katrina nhưng những cơn bão nhiệt đới cyclone là cơn bão lốc xoáy lớn từ 200 đến 2000 km với tốc độ gió thổi đạt trên 100 km/h. Các chuyên gia thời tiết biết đến chúng là bão nhiệt đới cyclone, nhưng chúng được gọi là bão hurricane ở vùng biển Carribe...)
=> Đáp án C (they ~ tropical cyclones)