第5题: [单项选择]The goods_________ when we arrived at the airport. A. were just unloading B. were just been unloading C. had just unloaded D. were just being unloaded 参考答案:D 答案解析:时间从句是过去发生的时间,首先确定主句肯定是过去时态;又因为货物应该是被卸,所以用被动语态。只有D符合语法结构。
第6题: [单项选择]人民警察的义务来源于( ) A. 人民警察的职责 B. 人民警察的职权 C. 法律的规定 D. 国家的任用行为 参考答案:D 答案解析:[解析] 人民警察的义务来源于国家的任用行为。