找出画线部分发音不同于其他三个单词的序号.
( )(1)A short B. doctor C. actor D. visitor
( )(2)A who B. why C. whose D. whom
( )(3)A peach B. bread C.tea D.seat.
( )(4)A cinema B.clock C.clean D.crop
( )(5)A clothes B.that C.thank D.those