题目

Had the boy worked harder, he ______ the exam. A．must have got through                         B．could get through   C．ought to get through                                 D．would have got through 答案：D在如图所示的四幅图中，符合安全用电要求的是（ ）A.电线上晾衣服B.C.用湿手触摸开关D.