请选择CBA6R,c-_*E8l)R;C5A*z2e1H/Z/Q)~/l({ ----It is _________ ruler. ---- It is not __________ eraser.+`6Z;i2z+M4e*J4`'\,G1c
A. /, an+`6Z;i2z+M4e*J4`'\,G1c
B. a; an+`6Z;i2z+M4e*J4`'\,G1c
C. the; the+`6Z;i2z+M4e*J4`'\,G1c