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"The instructor explained the new math concept clearly to the students. "

"He reinforced the handle with a metal rod and a bit of tape."

"He admired the historical reenactor's elaborate outfit, especially the embroidered waistcoat worn beneath his velvet doublet. "

"The protective helmet was essential for the construction worker. "

"The insulation in the attic helped keep the house warm in winter. "

"My sometimes neighbor, a retired teacher, still visits the school occasionally. "

"Every person who passes by is a potential customer."

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"strengthen a muscle"

"The thick walls were built for insulating the house from outside noise. "

"The large oak tree surrounding the picnic area provided welcome shade. "

"The teacher gave a demonstration of how to solve quadratic equations. "