33．When problems such as energy crisis, pollution and population explosion_________, people are asked to share the bitterness and endure the hardship with all the whole nation of the times．

A．are arisen

B．arise

C．arising

D．Arisen

房地产交易信息包括（）。

A.政策信息

B.房源信息

C.客源信息

D.价格信息

E.市场信息