请选择DCBA;m;t6[+m+\:U(u2g9q7_:m5ZHainan is one of the most beautiful ________ in China..|-w'x+U8I(H'N
A. city.|-w'x+U8I(H'N
B. cities.|-w'x+U8I(H'N
C. country.|-w'x+U8I(H'N
D. countries.|-w'x+U8I(H'N