选出下列每组单词中不同类的一项. ( ) l. A. who

( ) 2. A. were

( ) 3. A. my

( ) 4. A. young

( ) 5. A. hair

( ) 6. A. naughty

B. is

B. your

B. girl

B. long

B. old

C. am

C. they

C. little

C. cute

C. too