问题描述：
判断每组单词划线部分发音是否相同.相同的写S,不同的写D.
listen unit [i] eraser act [a] sorrry brother [o] late case [a]
phone sofa [o] please pencil [e] hat desk [a/e] book Ben [oo/e]
listen unit [i] eraser act [a] sorrry brother [o] late case [a]
phone sofa [o] please pencil [e] hat desk [a/e] book Ben [oo/e]
问题解答：
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