胎儿与母体进行物质交换的结构是（　　）

名著填空。
《水浒传》中“倒拔垂杨柳”的人物是（       ），《三国演义》中“煮酒论英雄”的主要人物是（      ），《红楼梦》中“教香菱学诗”的是（      ），《钢铁是怎样炼成的》这部作品的主人公是（            ）。

根据短文理解，从A、B、C、D四个选项中选择最佳一项填空。

    Long long ago, a king showed two men a large basket in the garden. He told them to fill it with water from a well. After they 1 their work, he left them, saying, “When the sun is down, I will come and see your work. ”

    At last, one of them said, “What's the use of doing this foolish work? We can 2 fill the basket. "3 man answered," That is none of your business." The first man said, “You may do as you like, but I am not going to work at 4 so foolish. ”He 5 his bucket(水桶)and went away. The other man said no word, and kept on carrying 6. At last, the well was almost 7.

    As he poured the last bucket of water into the basket, he saw a bright thing in it. He picked it up. It was a beautiful gold ring. Just then the king came. 8 he saw the ring, he knew that he had found the kind of man he wanted. He told him to keep the ring for himself. “You 9 so well in this little thing,”he said, " 10now I know I can believe you with many things.”