试题题干
The Labour Party and（） have been the dominant party in the UK since the mid-1920s.
参考答案
正确答案：
试题解析
A two-party system has existed in the UK since the late 17th century. Since the mid-1920s the dominant groupings have been the Conservative Party and the Labor Party.自17世纪晚期以来，英国一直存在着两党制。自20世纪20年代中期以来，主流政党一直是保守党和工党。