influenza

"He is a student of life."

"The doctor checked the patient's airways to make sure he could breathe properly. "

"The teacher explained the new math concept quickly. "

"The dry-stone wall used a large, flat through to support the top stones. "

"The lightning caused thunder."

"The spreads on the sandwiches at the picnic included peanut butter and jelly. "

"During the Middle Ages, Europe suffered through several devastating epidemics of the bubonic plague. "

"She packed her case rapidly and hurried out."

"The tomato plants had some kind of disease that left their leaves splotchy and fruit withered."

"The seasonal worker at the farm market helped with the harvest. "

"The lightning caused thunder."

"The flu was so contagious that everybody in town got sick!"