At the news that his wife fell off the building, he rushed out of the house, ________his threeyearold

boy ________.  [ ]

A. leaving; crying    

B. left; crying    

C. to leave; cry      

D. leave; to cry

带电作业应在良好天气下进行，若遇雷、雨、雪、雾不得进行带电作业，风力大于（）时，一般不宜进行带电作业。