题目

根据你的生活经验，判断下列做法中不正确的是   A．家用电器着火时用水扑救 B．炒菜时油锅着火，立即盖上锅盖 C．用肥皂水检验液化气罐是否漏气 D．天然气管道泄漏时，立即关闭阀门并开窗通风 答案：A10、He is supposed         the job，but he hasn’t．     A．to have finished                                          B．to finish     C．to be finished                                             D．to have been finished