请选择ABCD'U9r.s7V*c/V)D:~ I want _______ a map of China．5n7\*U-Z7R7y8[0P
A．buy5n7\*U-Z7R7y8[0P
B．is buying5n7\*U-Z7R7y8[0P
C．to buy5n7\*U-Z7R7y8[0P
D．am buying5n7\*U-Z7R7y8[0P