选出不同类的单词。(每小题2分,共20分) A. apple B. orange C. long A. two B. too C. seven A. UK B. USA C. CD A. boy B. girl C. short A .he B. she C. teacher A. mother B. brother C. teacher A. duck B. desk C. chair A. plane B. pear C. peach A. small B. giraffe C. short A. fifteen B. twelve C. friend