找出下列各组画线部分的发音不同的选项。① {#blank#}1{#/blank#} A．mountain B．coat C：know D．goat
② {#blank#}2{#/blank#} A．horse B．fork C．word D.story
③ {#blank#}3{#/blank#} A．word B．world C．work D．pork
④ {#blank#}4{#/blank#} A．take B．wall C．fall D．tall
⑤{#blank#}5{#/blank#} A．class B．afternoon C．basketball D．happy
