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15£®Questions 11 through 13 are based on the following passage£®
11£®A.37 years£®  B£®Less than 5 years£®  C£®About six years£®  D£®Since he began to work£®
12£®A£®Many people£®  B£®Nobody£®  C£®About 37 people£®  D£®Very few people£®
13£®A£®A quarter£®  B.37 percent£®  C£®One half£®  D£®One-fifth£®

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