The famous writer and editor of the newspaper as well as many reporters _________ to the quake-hit

villages to cover the post-quake relief.[ ]

A. has been sent  

B. have sent    

C. has sent    

D. have been sent

房地产市场的特征包括（）

A.地区性

B.供给调节滞后性

C.垄断竞争性

D.投资性

E.市场效率低