选出与其它单词不同类的词. ( ) 1. A. book ( ) 2. A

( ) 2. A. one

( ) 3. A. red

( ) 4. A. happy

( ) 5. A. blond

B. three

B. yellow

B. sad

B. long

C. four

C. brown

C. tired

C. short

D. to

D. colour

D. feel

D. straight