Jogging became popular some twenty years ago and has remained a favorite way of keeping fit．It is         running at a steady speed over short or long distances．Teenagers can jog and         ，with caution , can people in their seventies .
One of the main         jogging has over many other sports is that it can be done anywhere . People jog around campuses , in parks and even in urban areas . Special fields and running tracks are not         .
Similarly , no special         is required—no costly hats , gloves , or balls . Good quality running shoes are         , but otherwise the jogger can simply wear loose , comfortable clothing .
Having bended and         as basic warm-up , you are ready to begin jogging now .

A．originally B．basically C．necessarily D．especially

A．so B．yet C．such D．thus

A．drawbacks B．usages C．advantages D．points

A．essential B．satisfactory C．sensible D．convenient

A．decoration B．instrument C．clothing D．equipment

A．primary B．advisable C．unnecessary D．acceptable

A．expanded B．marched C．wandered D．stretched