_________(56)A.concern B.contribute toC.happen to

下面各选项中，均是C语言中合法标识符的选项组是A．for china to B．long_123 short 56_do C．void

56._________A. excitedB. intendedC. interestedD.

56._________A. reportB. respectC. representD. rev

56._________A. addedB. leftC. createdD. released

56._________A. strategies B. reasonsC. supportsD.

56._________A. watchedB. producedC. learntD. heard