They ____ on the program for almost one week before I joined them, and now we _____ on

it as no good results have come out so far.[ ]

A. had been working; are still working

B. had worked; were still working

C. have been working; have worked

D. have worked; are still working

审美形态的历史性，主要表现在( )

A．它是特定历史发展阶段的产物

B．它是多种审美因素的感性凝聚

C．它受到贯通古今的文化精神的制约

D．它的内涵是在历史发展中不断演变的

E．它表征着美在审美中生成的规则