karst

"The marching band practiced their formations on the football field. "

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

"The ruling party or coalition sometimes dissolves parliament early when the polls are favorable, hoping to reconvene with a larger majority."

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

"Except for one or two days a year, he usually walks to work."

"The poor drainage in the schoolyard caused puddles after the rain. "

"The student's sudden absence was an unusual for her. "

"From the classroom window, the entire landscape of the valley unfolded before us. "

"The white cliffs were made of limestone, a rock formed from ancient seashells. "

"The children formed a circle to play duck, duck, goose. "

"Hey, beautiful!"

"The intricate formation of the puzzle pieces allowed the child to assemble a picture of a dog. "