1.you will be happy if a friend comes from an other place,won’t you? 有朋自远方来,不亦乐乎?(有朋友从“另一个地方”来,你会不高兴吗?......我敢不高兴吗?) 2.that you know it is that you know it,that you don’t know it is that you don’t know it,that is the real wisdom. 知之为知之,不知为不知,是知也。(if you are clear about every"that"here,that is the real wisdom.) 3.three men walking,and th ............