On April 25, 2015, a 7.8-magnitude earthquake rocked Nepal, caused buildings to collapse, set off avalanches (17) _____________ Mount Everest and catapulted the entire region into chaos. The worst earthquake in 80 years (18) _____________ nearly 9,000 people, injured thousands, destroyed or damaged at least 880,000 homes and more (19) _____________ 1,200 health facilities. Multiple aftershocks throughout the region hampered rescue operations, terrified survivors and added to the death and injury toll. Then the monsoon season compounded the misery as survivors sought shelter amidst ruined buildings. AmeriCares immediately launched a large-scale relief effort sending aid workers, (20)_____________ teams, and emergency medicines and supplies to the disaster zone. 17. A. in B. before C. on D. after 18. A. kill B. kills C. killing D. killed 19. A. than B. then C. until D. without 20. A. medicine B. medical C. medically D. medicate