18．選出每組劃線部分讀音與其他三個不同的選項（　�。�
A．motherB．brotherC．photoD．son

分析 選出劃線部分讀音與其他三個不同的選項

解答 答案：C．mother[?m???]；brother[?br???]；photo[?f??t??]；son[s?n]在photo中的第一個字母o的音標是[??]，與其他三項不同，故選C．

點評 首先要弄準確這幾個單詞的發(fā)音，然后結(jié)合具體的題目，就可以確定正確答案．

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