阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

    My mom is very important to me. She was 40 years old ____ I was born. She takes good care of me.

    She did so many things for me ____ my elementary school years. When I was a child, she liked to prepare the ____ (delicious) food for each dinner everyday.

    ____, my mom was the one who often beat me. I always cried ____ (loud) to let the neighbours think she ____ (kill) me. For example, if she acted as though she was about to raise her hand to me, I would often open my ____ and let the world know about it. ____ anybody was passing by out on the road, she would either change her mind ____ just give me a few light touches. So early in life, I had learned that if you want something, you ____ make some noises.

    "Haibao, the mascot(吉祥物) of the 2010 Shanghai World Expo, is very cute, "said Gu Hui, a school kid. "I want a big toy like the mascot."

    Haibao looks like the Chinese word ren, which means people or a person. The name, a typical lucky one in Chinese tradition comes from the Chinese phrase "Si Hai Zhi Bao" —the treasure of the four seas. It also means the treasure of Shanghai, which lies beside the sea.

    Haibao's blue curly(卷曲的) hair looks like the waves of the sea. Its smile is a sign of the healthy spirit of China. Those thumbs-up(翘拇指) will welcome millions of people to Shanghai from around the world. Its big feet show China has the ability to host a successful Expo.

    Haibao was created by two artists, one from the mainland(大陆) and the other from Taiwan. The design is about people living together in the city. The designers want it to fit the theme of the Shanghai Expo, that is, a good life should be created by all the people and people should have harmonious relationships(和谐关系) with nature and society, so that life in cities would be better.

    Surely the mascot will become the lucky symbol and cultural remark of Shanghai Expo.

李白、杜甫、白居易的诗在内容与风格上具有不同特点，造成这种情况的根本原因是（    ）

—I can see one．