tanya520 发表于 2016-3-24 14:32:17


pick it up吧。。。。主语还是单数啊~

杨杨 发表于 2016-3-24 18:49:39

there is 表示单数，那后面也是单数
页: 1 2 [3]
查看完整版本: There is a pair of glasses on the floor,pick it up还是pick them up?