找出每组单词中不同类的选项。(共5小题；每小题1分，满分5分)

A．pencil B．pear C．ruler D．pen

A．sad B．present C．excited D．happy

A．shoe B．head C．hand D．arm

A．ate B．went C．flew D．swim

A．monkey B．tiger C．kitchen D．giraffe