i know!
, G/ g5 n ?6 Rtvb now,tvbnow,bttvbwhen they can have 15 mins discussion.公仔箱論壇; ?5 n( J4 x+ {7 z3 z
make 1 of them to do a specific job whcih is counting
: B! o7 D! M; o; K6 Dtvb now,tvbnow,bttvbonly him can turn on off off the light.5.39.217.77:8898$ J$ y5 X% ~. h! \. j% @
Basically, if you are the first time to get in the room, turn on the light, 5.39.217.77:8898% q; E& L. f, o/ n( {8 @1 z* M
then wait for "the special man" to turn the light off....公仔箱論壇) o3 S/ d# ?. d Y B* V& r( w
when "the special man" count in up to 30 (included himself)
: x5 o0 S$ O6 [( f公仔箱論壇then it is done! |