( ) Tom often helps people ____ his work . A. on B. at C. in
挑出不同类的一项 A.bird B. bear C. blue
挑出不同类的一项 A.color B. green C. yellow
挑出不同类的一项 A.look B. have C. really
挑出不同类的一项 A.I B. is C. it
挑出不同类的一项 A.jeep B. robot C. pig