请写出质子数和电子数都与一个钠离子相同的阳离子的符号：____。
cook, on, do, live, busy, read, play, about, clean, weekend
Hello! My name is Zhang Ming. I ____ in Qingdao. I am a student. Do you want to know about my ____? I'm very happy ____the weekend. I can ____many things(事情). Usually I do my homework and ____books. Sometimes I ____the rooms and ____dinner with my mum. I often watch TV and ____ pingpong with my father. I'm ____at home. This is my weekend. What ____your weekend?
书面表达
某英文报举办“家乡的变化”主题征文活动。请你根据以下提示，以“The Changes in My Hometown”为题，用英语写一篇80词左右的短文。
过去：
1生活贫困，房屋破旧。
2污染严重，垃圾遍地。
3交通不便，游客很少。
现在：
1生活：住房宽敞明亮，许多人有了自己的汽车。
2环境：山更绿了，水更清了，天更蓝了。
3旅游：每年有成千上万来自世界各地的游客。
将来：请你展望家乡的未来。
注意：1. 文中不得出现具体的地名。 2. 标题和开头已给出，不计入总词数。
The Changes in My Hometown
In the past, my hometown was very small.
