阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式The strongest sandstorm in recent 10 years 56(strike) the Chinese capital Beijing on themorning of March the 15th with a visibility(HE LEE)of less than one kilometer. 57(lucky)the citys meteorological department(气象部门 had issued58 yellow warning in advance