问题
选择题
It is reported that the underground system in Changsha now will be open in 2015.
A．is being built
B．built
C．being built
D．is built
答案
答案：C
考查非谓语动词。句中being built in Changsha now现在在长沙被建，在句中作定语，修饰the underground system，故选C。