请选择DCBA4j6R2W5E;P8e*Y7X.V5B Hi, Mr. Smith. I didn't know you were in New York. How long_________here?9J(L*h*}0a.k/U0a
A. have you come9J(L*h*}0a.k/U0a
B. were you9J(L*h*}0a.k/U0a
C. have you been9J(L*h*}0a.k/U0a
D. will you come9J(L*h*}0a.k/U0a