假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
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。
    My high school life has made me learn many things. Between them teamwork is the most significantly for me. In fact, I didn't realize its importance after I was elected monitor. In the begin, I did almost all the duties myself, however, others students cared little about class activities. Therefore, I worn out and depressed. Then I turned to my head teacher but he advised me to cooperate with others. Gradually, I realized the strengths of my classmates and managed to have everyone to play a part in class. It is working in teams instead of on my own which has freed me of trouble and make my work more efficient.

目前，财政部将证券交易印花税税率由原来的1‰（千分之一）提高到3‰．如果税率提高后的某一天的交易额为a亿元，则该天的证券交易印花税（交易印花税=印花税率×交易额）比按原税率计算增加了（ ）亿元．  

如图为一个池塘的生态系统，请分析回答下列问题：

用一个量筒、水、一根细针做实验来测小木块的某些物理量（ρ_木＜ρ_水，小木块能放入量筒中），下列说法中正确的是（   ）

阅读下面的文字，根据要求作文。

微澜，春水吹皱，映照彩虹，奏响流水欢歌；微澜，尺水兴波，积蓄波折，酿成逆水坎坷。微澜，风行水上；微澜，荡漾心中。

请以“微澜”为题写一篇800字以上记叙文。