rooftops

"The divers encountered a huge school of mackerel."

"Asphalt, composed of oil and sand, is a widely used material for roads."

"They played long and hard."

"The lab technician carefully measured the formalin for the experiment. "

"The center of the clock showed the time was 3:00. "

"Go easy on him: he is but a child."

"The somewhat of extra help she received from her tutor significantly improved her test scores. "

"He covered the baby with a blanket."

"After the first coat of paint dried, he applied another layer."

"The building of the bridge will be completed in a couple of weeks."

"The editor composed a historical journal from many individual letters."

"Pigeons often gather in the park to be fed breadcrumbs. "