【判断题】民国时期,中国跤成为第6届(1935年)、第7届全国运动会的正式比赛项目。
【单选题】___ six years since I began to study English.
【单选题】It _____ six years since his grandfather died. [ ]
【单选题】( )six years since I began studying English.
【单选题】It's six years since I _______ him. [ ]
【单选题】__________ nearly six years since I started to study English