单选题 You will be getting married and having a family ______ and then you'll understand why parents want to protect their children.
A. by and by B. in general C. at large D. at length

【正确答案】 A

【答案解析】[解析] 短语辨析题。等你结婚有了孩子就会渐渐明白为什么父母想要保护他们的孩子。by and by，逐渐地；in general，总的来说；at large，普遍地；at length，最后。