《体育颂》是____的作品,每一个自然段都以“啊,体育……”开头,这样让全文在结构上____,在感情上更好地抒发了作者____之情。

The score was 2____1.（介词填空）

已知集合M={(x，y)|y=f(x)}，若对于任意$\left(x_1,y_1\right)\in M$，存在$\left(x_2,y_2\right)\in M$，使得$x_1{x}_2+y_1{y}_2=0$成立，则称集合M是“$\Omega$集合”. 给出下列4个集合：
①   M={(x，y)|y=$\frac{1}{x}$}         ② M={(x，y)|y=e^x－2}
③    M={(x，y)|y=cosx}      ④ M={(x，y)|y=lnx}
其中所有“$\Omega$集合”的序号是（    ）

增加：在缺词处加一个漏字符号（/\），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1). 每处错误及其修改均限一词。

2). 只允许修改10处，多者（从第11处起）不计分。

    Mr. Grey liked walking from a station to his office. One morning he was walking along the street while a stranger stopped him and said to him, “You may not remember me, sir, but one year before I came to London without a penny in my pocket. I stopped you in this street and asked you lend me some money, but you gave me £5. You said you are willing to take a chance to give us a new start.” Mr. Grey felt a bit surprising and thought for a few second. Then he said, “Yes, I remember you.” “Well, are you willing to take for another chance?” The stranger said carefully.