世界因皒而精彩In April 918 flu broke among American troops stationed in Fran ___. It quickly spread through all the armies but caused relatively __9__deaths. Four months later, however, a second outbreak started which proved to be a _10___. It killed not only the old and already sick but also
__11__young ___s. It went through every country in the world, only a few distant islands in the South Atlantic and the Pacific re ___ining __12__. It brought the life of whole countries __13__, food supplies stopped and work loss was very great. _14___ the great outbreak ended, it had killed at least 15 million people. Thereafter there have been several great outbreaks throughout the world. It is thus __15__that influenza is a terrible infection that we have to pay more attention to.
1. A cause B outbreak C sour ___ D effect
2. A being attacked B having been attacked C attacked D attacking
3. A sitting B standing C living D appearing
