I have ____ ____ ____.

    A year has twelve months. My favorite month is October. October 1^st is National Day(国庆节）. We have a seven-day holiday(假期). During the holiday, my parents always take me to see my grandparents.

    Our school has some interesting things in October. On the 12th , we have a soccer game. I don't love basket ball. It's difficult for me. But I love soccer. I love playing soccer and watching soccer games. We have a book sale on October 20th. I have three old books and I want to sell them. The art festival is fun. We have it on October 29th. My birthday is also on this day. October is a really great month for me.

如图，矩形OABC的四个顶点坐标依次为O（0，0），A（$\frac{\mathrm{\pi }}{2}$，0），B（$\frac{\mathrm{\pi }}{2}$，1），C（0，1），记线段OC，CB以及y=sinx（0$\le x\le \frac{\mathrm{\pi }}{2}$）的图象围成的区域（图中阴影部分）为Ω，若向矩形OABC内任意投一点M，则点M落在区域Ω内的概率为（　　）