As is widely acknowledged, a great number of traffic accidents ____ numerous deaths and countless property loss all over the world every year.   

As is widely acknowledged, playing outside helps children learn through curiosity, which , _ __,   promotes creativity.

As is widely acknowledged, playing outside helps children learn through curiosity, which , _ __,   promotes creativity.

  A．in brief    B．in turn       C．in conclusion   D．in return

As is widely acknowledged, a great number of traffic accidents ____ numerous deaths and countless property loss all over the world every year.   

 _______ as a promising tennis player in the world, Chinese player Zheng Jie succeeded in entering the next round in French Open Tennis.

A、Having acknowledged                                 B、Acknowledging

C、Acknowledged                                           D、To acknowledge