Having worked abroad for several years, Janson wanted to settle down to a job in his homeland.
A. permanent
B. constant
C. primary
D. thorough
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(答案→)A. permanent
B. constant
C. primary
D. thorough
解析：考查形容词辨析。句意：在国外工作几年以后，约翰逊想找一份固定的工作，永久定居国内。A永久的；B持续不断的，恒定的；C首要的，原始的；D彻底的，详细的，全面的，仔细的。故选A。