请选择ABCD,R.M8{'` -What' s that on the floor？4x.z.@.u-a,T1X-Y.t+N;g
-It' s__________orange．4x.z.@.u-a,T1X-Y.t+N;g
A．an4x.z.@.u-a,T1X-Y.t+N;g
B．a4x.z.@.u-a,T1X-Y.t+N;g
C．the4x.z.@.u-a,T1X-Y.t+N;g
D．this4x.z.@.u-a,T1X-Y.t+N;g