Certain prepositions (after, as, before, since, until) serve as subordinating conjunctions when they're followed by a clause: 1  You better get out of town before sundown. (Before is used as a preposition.) 2  Many people run out of ideas long before they run out of words. (Before is used as a conjunction.)
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Plaster City is an unincorporated community in Imperial County in the U.S. state of California. It is located 17 miles (27 km) west of El Centro, at an elevation of 105 feet (32 m).United States Gypsum operates a large gypsum quarry and plant there and owns the town.he 3 ft (914 mm) gauge line runs north to a gypsum quarry and brings gypsum from the quarry to the plant. Plaster City is located at 32Â°47â²33â³N 115Â°51â²31â³Wï»¿ / ï»¿32.79250Â°N 115.85861Â°Wï»¿ / 32.79250; -115.85861 west of El Centro, California. The first post office at Plaster City opened in 1924. The ZIP Code is 92251.