题目

在数轴上表示a，b的点的位置如图所示，则a，b，a＋b，a－b中，负数有() A . 1个 B . 2个 C . 3个 D . 4个 答案：C语法填空Long time ago, a boy (name) Bob met a new friend in QQ, she is Larry. Larry works with Transport Drivers. Inc. One morning in 2009, Larry was traveling along 165 north after delivering to one of his customers when he saw a carits bright lights on. As he got even(close), he found another vehicle upside down on the road. One more lookhe noticed fire shooting out (repeat) from under the disabled vehicle. Larry pulled over, set the brake and got hold of the fire extinguisher (灭火器). Two good bursts from the extinguisher and the fire (put) out.The man who had his bright lights on came over and told Larry he had made a call. They then heard a woman's voice coming from the damaged vehicle. (approach) the vehicle, they saw that a woman was trying to get out of the broken window. They told her to stay still, but she thought the car was going to explode. Larry told her that he had already put out the fire.Once fire and (emergent) people arrived, Larry and the other man backed off and let them go to work. Then, Larry asked the police he was needed or free to go. They let him and the other man go.One thing is for certain—It (be) his efforts that most likely saved the woman's life.