题目内容：

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。

Last Sunday I saw a worst storm in years. It came sudden and went on for over three hours. After lunch, I went into my room to have a rest. The air was hot, but all was quiet. Then a strong wind started to blow into my room. Pieces of paper on my desk flew high into the air and some flew out the open window. As I ran out to catch it, big drop of rain began to fall. When I come back into the house, it was raining more harder and harder. Then I heard a loud crashing sound from the back of the house. When I ran out to find out that had happened, a big tree had fallen down and broke the top of the backroom .