单选题 If Steve ______ his driver's license with him, the police officer would not have issued him a traffic ticket.
A. has
B. has had
C. would have had
D. had had

【正确答案】 D
【答案解析】在第三条件句中，if从句使用过去完成时，由had加主要动词的过去分词构成，只有选项(D)符合语法要求。选项(A)是一般现在时第三人称单数，选项(B)是现在完成时，而选项(C)是在第三条件句主句中的用法。