On Children’s Day,           of the students was pleased because they each          a present.      

A．every one; was given

B．everyone; was given

C．every one; were given

D．everyone; were given

轨道接头的间隙及高低左右差错各不得大于（）。

A、5mm，2mm

B、5mm，5mm

C、2mm，5mm

D、4mm，6mm