i know!
& m: a, L6 Q1 V: Awhen they can have 15 mins discussion.$ J2 L. P G- V6 k1 r4 I' y- }, G
make 1 of them to do a specific job whcih is counting* `8 A' U2 L2 M3 M
only him can turn on off off the light.
/ b" j9 P" n7 b" ~ l公仔箱論壇Basically, if you are the first time to get in the room, turn on the light,
! `; v/ s2 L) {then wait for "the special man" to turn the light off....
' G1 z7 L) E% F; M7 E9 Y公仔箱論壇when "the special man" count in up to 30 (included himself)
% l/ G( x8 d8 a/ R' v8 U3 H5.39.217.76then it is done! |