选出下列不同类的一项。 ( ) 1. A. pencil B. pen C. ruler D. orange ( ) 2. A. call B. ring C. baseball D. watch ( ) 3. A. this B. that C. it D. yes ( ) 4. A. me B. my C. his D. your ( ) 5. A. am B. is C. are D. and ( ) 6. A. five B. six C. eight D. number ( ) 7. A. red B. zero C. green D. black ( ) 8. A. in B. on C. under D. take ( ) 9. A. bed B. table C. where D. plant ( ) 10 A. mom B. son C. daughter D. they