9~(\+r9|+{8[(E “Keep off the grass”means ________ ．6O9y9r(x1i.R,I0},X
A．we shouldn’t make any noise on the grass6O9y9r(x1i.R,I0},X
B．we shouldn’t walk on the grass6O9y9r(x1i.R,I0},X
C．we shouldn’t eat or drink on the grass6O9y9r(x1i.R,I0},X
D．we shouldn’t smoke on the grass6O9y9r(x1i.R,I0},X