血液的组成为（　　）

    我老实告诉你一句话：“凡职业都是有趣味的，只要你肯继续做下去，趣味自然会发生。”为什么呢？第一，因为凡一件职业，总有许多层累、曲折，倘能身入其中，看他变化、进展的状态，最为亲切有味。第二，因为每一职业之成就，离不了奋斗；一步一步的奋斗前去，从刻苦中将快乐的分量加增。第三，职业性质，常常要和同业的人比较骈进，好像赛球一般，因竞胜而得快感。第四，专心做一职业时，把许多游思、妄想杜绝了，省却无限闲烦闷。孔子说：“知之者不如好之者，好之者不如乐之者。”人生能从自己职业中领略出趣味，生活才有价值。孔子自述生平，说道：“其为人也，发愤忘食，乐以忘忧，不知老之将至云尔。”这种生活，真算得人类理想的生活了。

    Today is Sunday. My Brother and I1at home. We2to take two boxes to the room.3box is big, but it's light(轻）. My brother's box is4, but heavy（重）. We put5on the table. We can see6clothes in the boxes, but my7aren't in them. I8find my socks. My Brother can9me to find them. They're10the bed. And my shoes are under it, too. I must look after (照看)my things. We put the11boxes away. The chair is12. My Brother and I can mend(修理)it. After that, we13basketball14the playground(操场). We are very happy. We like this15.