选出下面单词中括号部分读音不同的一个单词

选出下面单词中括号部分读音不同的一个单词
chair Chinese teacher school (ch)
go no not know (o)
box dog from home (o)
this three these that(th)
apple name that map (a)
twelve pencil (e)leven desk (e)
this fine bike five (i)
thank and what bag (a)
far car are can(a)