单选题 The little boy ______ his father by begging over and over to go to the zoo.

【正确答案】 A

【答案解析】plague折磨，烦扰；prey on捕食；(情绪，疾病)折磨，损害；prevail upon说服，劝服；raid袭击。句意：小男孩缠着他父亲再三恳求要到动物园去。