完形填空

     I have a happy family. Look! Here is a 1 of my family. The boy in bed is2. I am 3 English boy. My4 is Peter. I am eleven years old. This is my sister. Her name is Kate. 5 is nine years old now. Kate and I are students now. We are 6 the same school. 7 are my father and mother. My father is a teacher. How old is my father? He is forty. My mother is 8 nice. She cooks(做饭) for us every9. We all 10 her so much. We are a happy family.

抛物线y=$\frac{1}{2}$x²，y=-3x²，y=x²的图象开口最大的是（　　）

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     “吹面不寒杨柳风”，不错的，像母亲的手抚摸着你。风里带来些新翻的泥土的气息，混着青草味儿，还有各种花的香，都在微微润湿的空气里酝酿。鸟儿将巢安在繁花嫩叶当中，高兴起来了，呼朋引伴地卖弄清脆的喉咙，唱出宛转的曲子，跟轻风流水应和着。牛背上牧童的短笛，这时候也成天嘹亮地响着。

树叶繁茂，寻不到完全相同的两片树叶；人海茫茫，找不出没有任何差异的两个人。这说明（    ）