Directions: Fill in the blanks with the appropriate words. 

The Spanish flu ____(1)____ of 1918, the deadliest in history, infected an estimated 500 million people _____(2)_____—about one-third of the planet’s population—and killed an estimated 20 million to 50 million ____(3)____, including some 675,000 Americans. The 1918 flu was first observed in Europe, the United States and parts of Asia before swiftly spreading around the world. At the time, there were no effective drugs or _____(4)_____ to treat this killer flu strain. Citizens were ordered to wear masks, schools, theatres and businesses were shuttered and bodies piled up in makeshift_____(5)_____ before the virus ended its deadly global march.