请选择ABCD9Y8|:Y'g/o It's important _________ with fire.(a:e.G+J;L;V,j5r
A. to careful(a:e.G+J;L;V,j5r
B. being carefully(a:e.G+J;L;V,j5r
C. to being careful(a:e.G+J;L;V,j5r
D. to be careful(a:e.G+J;L;V,j5r