请选择ABCD9c4R9S8s.Z+P2J/H7r-Y'S4A The headmaster stopped ______ to us because there was a call for him.;K*r-\,f9P/\
A. talking;K*r-\,f9P/\
B. to talk;K*r-\,f9P/\
C. saying;K*r-\,f9P/\
D. to say;K*r-\,f9P/\