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仅限一词；2．只允许修改10处，多者(从第11处起)不计分。

    As winter vacation are coming soon, my classmates are trying very hardly to get train tickets to go home. But I have made up my minds to spend the vacation far from home for first time in my life. My parents have agreed to visiting me, and I will have a different vacation. When they came here, I will show them around my university and the city just as well. I have decided to buy them some nice gifts. It will be a big surprising for them. My parents have done a lot to me, and I think it is high time that I did anything special to express my thanks.

当人体幼年缺乏碘时，其体内缺乏的激素和身高变化的曲线分别是图中的　

You can improve your English_______practicing more.