摘要： 表示选择关系的连词.连接的双方只取其一.常用连词有or, either...or, otherwise 例如: a) You can go to Beijing either today or tomorrow. b) You must get up early or you won’t catch the early bus.
网址：http://m.1010jiajiao.com/timu3_id_2500543[举报]
网址：http://m.1010jiajiao.com/timu3_id_2500543[举报]