Thank you for all your hard work last week. I don’t think we _____ it without you.

A．can manage

B．could have managed

C．could manage

D．can have managed

我国的民族区域自治必须以少数民族聚居区为基础，它是( )的结合。

A．民族自治与区域自治

B．地方自治与民族文化自治

C．民族自治与地方自治

D．区域自治与民族文化自治