A. AT B. TO C. FOR D. INREAD THE FOLLOWING PASSAGE AND MARK THE LE...

44. A. at B. to C. for D. inRead the following passage and mark the letter A, B, C or D on your answer sheet to indicatethe correct answer to each of the questions.Pandemic (dịch bệnh)Diseases are a natural part of life on Earth. If there were no diseases, the population would grow tooquickly, and there would not be enough food or other resources. So in a way, diseases are nature'sway of keeping the Earth in balance. But sometimes they spread very quickly and kill largenumbers of people. For example, in 1918, an outbreak of the flu spread across the world, killingover 25 million people in only six months. Such terrible outbreaks of a disease are called pandemics.Pandemics happen when a disease changes in a way that our bodies are not prepared to fight. In