请选择DCBA.D6v)w9Z;[0\7U.d0r9t8@9K.[+q-t That's the bell. It's time ________ to ________ classroom.2g+I;K4z3E(I,u1D2]+r*J
A. to go，a2g+I;K4z3E(I,u1D2]+r*J
B. go，the2g+I;K4z3E(I,u1D2]+r*J
C. to go，the2g+I;K4z3E(I,u1D2]+r*J
D. go，a2g+I;K4z3E(I,u1D2]+r*J