单选题 The manager is calling on a ______ customer trying to talk him into signing the contract.
A. prosperous B. preliminary C. pessimistic D. prospective

【正确答案】 D
【答案解析】本题考的是形容词与名词的搭配。A项意为“繁荣的”，B项意为“初步的”，C项意为“悲观的”，D项意为“预期的”。根据题意，选项D为正确答案。