请选择ABCD8l/V'm3W,q9l6Y5y-V-l(GThere is ______ “h ” , ______ “o”，_______“u ” and ______ “r ”1];](r9T7o:z
in the word “hour ”.1];](r9T7o:z
A. an ; an ; a ; an1];](r9T7o:z
B. a; an; a; a1];](r9T7o:z
C. a; an ; an; a1];](r9T7o:z
D. an; an ; an ; an1];](r9T7o:z