Mr. White is a careful and experienced engineer, so he is often______to finish some challenging tasks.A.appreciatedB.approachedC.appointedD.agreed
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C解析试题分析：考查动词辨析：A. appreciated欣赏，B. approached靠近，C. appointed任命，委派，D. agreed同意，句意：怀特先生是仔细的有经验的工程师，所以他经常被派去完成有挑战性的任务。选C。
考点：考查动词辨析