实施绿色通道制度的企业在口岸对有关申报内容进行更改，口岸检验检疫机构应按绿色通道制度的规定予以放行。 ( )

The old engineer's eyes still shone bright in the wrinkled brown face and his step as he came across

the room was________,though slow.    [ ]

A. shaky    

B. heavy    

C. casual    

D. steady