Her mother goes to work ________ bus every morning.

把下列各数填在相应的大括号里．

﹣2，0.50，3$\frac{1}{5}$，432，20，0，﹣$\frac{1}{3}$，0.789，﹣2016，3

整数集合{                                          …}

负整数集合{                                        …}

正分数集合{                                       …}

负分数集合{                                       …}．