题型：问答题 Choose the different words. 选出下列单词中不属于同一类的单词。( ) 1. A. cat ( ) 2. A. car ( ) 3. A. tree ( ) 4. A. wolf ( ) 5. A. library ( ) 6. A. sweater ( ) 7. A. Monday ( ) 8. A. mane ( ) 9. A. cold ( ) l0. A. bird B. cow B. gym B. eighty B. elephant B. shop B. sheep B. Saturday B. stripes B. weather B. lion C. buy C. truck C. forty C. tiger C. classroom C. shoes C. Tuesday C. trunk C. hot C. inside D. duck D. cab D. seventy D. rock D. gym D. shirt D. today D. cold D. sunny D. pig 查看答案
的根的个数为( )．