【题目】读单词，选出下列每组单词中划线部分发音不同的一项。
1. ________ A. bus B. rule C. study D. club
2. ________ A. head B. bread C. heavy D. meat
3. ________ A. cook B. room C. soon D. cool
4. ________ A. thin B. three C. that D.think
5. ________ A. rich B.Christmas C. cheap D. watch
【答案】1.B 2.D 3.A 4.C 5.B
【解析】
略