用计算器计算某个运算式，若正确的按键顺序是 ，则此运算式应是（　　）

王明：老师，今天我不小心丢失了钱包和钥匙。

老师：什么时候丢的？

王明：中午在餐厅。

老师：钱包和钥匙什么样子的？包里有什么 ？

王明：钱包是黑色的，有拉链。钥匙放在包里，有五六把钥匙，包里还有六十几块钱和学生证。

老师：好的，你先别急。你去告知班长，让他去广播室播一条通知。

短文改错

假定英语课老师要求同桌交换修改作文，请你修改同桌的一下作文。文中共有10处语言错误，每句最多两处。每处错误仅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。

    It is well-known that good habits do us good all our life. Entered high school, I took delight in having fast food and often eat too much. In the end, I was so serious overweight that I suffered a lot from my awkward appearance. It made matters worse was the fact that my classmates made a fun of me at times. From now on, I made up my mind to avoiding snacks. In the meanwhile, I took off jogging to lose weight. To my surprise, it was not long until I did succeed in creating my new appearance. Only then I start to appreciate the importance of developing a good habit.