请选择DCBA4R1h0s.m7Z(M5\4Q8\2w9W0SWe ________ run in the corridors.2d/M)G3a,n2B7Q
A. should2d/M)G3a,n2B7Q
B. shouldn’t2d/M)G3a,n2B7Q
C. must2d/M)G3a,n2B7Q
D. can2d/M)G3a,n2B7Q