选出划横线部分发音不同的一项： (10分)
( ) （1）A.sing B. pig C. dog D. big
( ) （2）A. three B. thanks C. that D. think
( ) （3）A. came B. cake C. fat D. take
( ) （4）A. snow B. yellow C. now D. blow
( ) （5）A. meat B. seat C. bread D. peach