摘要:Great changes in China in the past 20 years. A.took place B.were taken place C.have taken place D.have been taken place 答案:C take place与happen这两个词没有被动语态.in the past 20 years表明应该用完成时态.

网址:http://m.1010jiajiao.com/timu3_id_2903790[举报]

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网