第20题: [单项选择]The Joint Declaration on the future of Hong Kong, which we have just signed ______ our two governments, is a landmark in the history of international diplomacy. A. in behalf of B. on behalf of C. represented D. represent 参考答案:B 答案解析:on behalf of sb.此处为固定搭配,意为“代表某人”。根据题意,选项B正确。