增加：在缺词处加一个漏词符号(∧)，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，多者不计分。
Last Saturday,I put my wallet in the bag which was at back of my bike.I rode for about half an hour.As I neared my home I found that I kept the bag opening all the way.The wallet had fallen out somewhere in the way,it made me upset.Just then I received a phone call saying that my neighbor is waiting for me..Someone had sent it to my home.I felt very pleasing and I went home at once.It was turned out that I put my ID card in the wallet.No one was at home for he gave it to my neighbor.I have never found out what he was because he did not tell my neighbors his name when he left.at后面加the
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(答案→)at后面加the
解析：
【小题1】at后面加the 固定搭配at the back of在…后面。
【小题2】opening改为open 形容词open本身就可以作为宾语补足语。
【小题3】in改为on 固定词组on the way在路上。
【小题4】it改为which 本题是一个非限制性短语从句，which指代一句话的内容做主语。
【小题5】is改为was 本文描述的是一个过去发生的事情，故使用一般过去时。
【小题6】pleasing改为pleased 主语是I，应该使用pleased最人的情况进行说明。
【小题7】was去掉 turn out是一个系动词性质的短语，没有被动语态的形式。
【小题8】for改为so 上下文之间是因果关系，foe只是起一个补充说明的作用。
【小题9】what改为who 根据句意说明我从未发现他是谁？
【小题10】 neighbors改为neighbor 根据上文提及的my neighbor。