outbreak

"The flu was an epidemic at the school last month, causing many students to miss classes. "

"As we turned down the street I was appalled by the vandalism: spray paint and smashed windows that were everywhere."

"His sudden appearance surprised me."

"My brother uses the underground to get to work every day. "

"My sister is very helpful, especially when it comes to organizing things. "

"The volcano's eruption sent ash raining down on the nearby town. "

"The teacher's explanation of photosynthesis was understandable. "

"Her outburst of anger surprised everyone in the quiet office. "

"The geologist studied the rocks in the park. "

"To explain a chapter of the Bible."

"It surprises me that I owe twice as much as I thought I did."

"The rock layers in the Grand Canyon provide a detailed geological record of the Earth's past. "