____ happened to be no one in that house when the typhoon hit the area.

A．It

B．There

C．This

D．That

资产阶级抽象人性论所犯的错误有 ( )

A．唯心史观

B．形而上学

C．否认人性在一切社会中都有阶级性

D．否认了人性的客观内容