TwobirdsTwo birds两只鸟Teacher: Here are two birds, one is aSwallow, the other is a sparrow. Now who can tell us which is which ?老师： 这儿有两只乌，一只是燕子，另一只是麻雀。谁能指出哪只是燕子，哪只是麻雀吗？Student: Icannot point out but I know the answer.学生：我指不出，但我知道答案。Teacher: Please tell us.老师：请说说看。Student:The swallow is beside the sparrow and the sparrow is beside the swallow学生：燕子旁边的就是麻雀，麻雀旁边的就是燕子。
