Turn on the television or open a magazine, and you often see advertisements showing happy and balanced families.

A．are often seeing

B．will often see

C．have often seen

D．would often be seeing

既属于新民主主义革命动力又属于社会主义革命与建设动力的阶级是

A．民族资产阶级

B．农民阶级

C．小资产阶级

D．知识分子