根据汉语意思完成下列句子。

1. There are many people here ________ ________(度假) .

2. We all ________ ________ ________ ________(过得愉快) in the park.

3. They often ________ ________(去购物) on weekends.

4. A small boy was crying ________ ________ ________(在角落).

5. I ________ ________ ________(步行回到) the hotel.

6. We ________ ________(决定) play tennis in the afternoon.

7. What do you ________ ________(认为) sports shows?

8. Please don't ________ ________ ________(迟到) class.

9. We can ________ ________ ________(听音乐) after class.

10. There are ________ ________(成千上万) women soccer players in China.

如图，有一列曲线P₀，P₁，P₂……，已知P₀所围成的图形是面积为1的等边三角形，P_k+1是对P_k进行如下操作得到：将P_k的每条边三等分，以每边中间部分的线段为边，向外作等边三角形。再将中间部分的线段去掉(k=0，1，2，……)．记S_n为曲线P_n所围成图形的面积。

求