阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

    One day a dentist (牙医) was starting his morning work. ____ (sudden) a man ran in. His face was red, ____ he could only say “Quick! Quick!” The dentist thought he must be very ____ (illness). His assistant (助手) helped to make the poor man sit in the chair. The dentist ____ (give) the man some medicine ____ (make) the man sleep. Then, he looked into the ____ (man) mouth and pulled out all the bad ____ (tooth). As soon ____ the man woke up，he said in a low voice, “Quick, doctor, quick!”

    “It's all right now”, ____ dentist told him, “It is over.”

    “You don't understand.” said the man. “I came to tell you that ____ house is on fire."

【环境保护】下图是“某次沙尘天气影响范围示意图”。读图回答下列问题。

说明图中A处沙尘天气强烈的自然原因？西北荒漠化会给华北地区沙尘天气带来沙源，为减少我国中东部地区的沙尘天气，西北地区荒漠化防治刻不容缓，请给出防治措施。

LED灯具有节能、环保等特点，如图是额定电压为220V、额定功率为4.4W的LED灯泡，该灯泡的额定电流是　 ____　A，若它每天正常发光5h，一个月（30天）消耗的电能是　 ____　kW•h，与普通白炽灯相比，在达到相同亮度的条件下，假设LED灯可以节约90%的电能，则这个LED灯与功率为　 ____　W的白炽灯亮度相当．

阅读唐朝诗歌：尽道隋亡为此河，至今千里赖通波。若无水殿龙舟事，共禹论功不较多。
根据所学知识回答：