选出发音不同的一项。
( )(1)A.shirt B. girl C.sister
( )(2)A.Thursday B.earth C.colour
( )(3)A.learn B.teacher C.colour
( )(4)A.head B. bread C.meat
( )(5)A.ruler B.pleasure C.eraser
( )(6)A.egg B.head C.apple