找出每组单词中不同类的一项。 ()1. A. hat B. pen C. book ()2. A. me B. she C. they ()3. A. tea B. cake C. milk ()4. A. China B. England C. Chinese ()5. A. short B. dance C. sing ()6. A. big B. walk C. small ()7. A. plane B. train C. doll ()8. A. juice B. banana C. pear