(2013·山东济宁一模)How close parents are to their children a strong influence on the development of the children's characters.
A. having
B. had
C. has
D. have
网友回答
A. having
B. had
(答案→)C. has
D. have
解析：选C 考查主谓一致。句意：父母对他们的孩子们的亲近程度对孩子们的性格培养有很大影响。题干中缺少谓语，故排除A项；“How close parents are to their children”作主语，谓语动词用单数形式，故排除D项；本句在介绍一种理论，用一般现在时，故答案为C项。