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"You can create the color orange by mixing yellow and red."

"The teacher explained the new math concept quickly. "

"The car's exhaust was making a loud rumbling noise. "

"The sudden announcement of a school holiday surprised everyone. "

"The nurse injected a painkilling drug into the veins of my forearm."

"There are a number of household devices in a kitchen such as a dishwasher, a garbage disposal, or an electric can opener."

"The increase in homework assignments this week was significant. "

"The ancient Romans used a powerful siege engine to break down the city walls. "

"There are eight planets in the solar system."

"The students engaged in lively discussion during their history class. "

"The aircraft flew over the school playground during the morning assembly. "

"Pierre was a master swordsman, and could parry the thrusts of lesser men with barely a thought."