成语 12

Opportunity slips by quickly 稍纵即逝

Have unwarranted anxieties 杞人忧天

Die a natural death ; Die of old age in bed 寿终正寝

Act as a go-between 穿针引线

Bringing destruction upon oneself 飞蛾投火

To be all in a jumble 茫无头绪

Bustling with activity 熙来攘往