John always tries to _____ people who are useful to him professionally.A.developB.provokeC.correspondD.cultivate
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D解析 本题译文：约翰总是力图结识在职业方面对他有用的人。cultivate sb.结识（有地位的人），培养与......的友谊：He always tries to cultivate rich and famous people.(他总是极力结识有钱的知名人士。)