论述加强党的建设的重要性和紧迫性。
抗日根据地的社会性质是（）
John complained to the bookseller that there were several pages______ in the dictionary.
You'd better take these documents with you __ you need them for the meeting.
“白马非马”的错误在于（）
1945年4月，毛泽东在中共七大政治报告中提出了建立（）的主张。
