下面是一段文章，请你对其进行修改。文中共有10处错误，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：在缺词处加一个漏词符号（∧），并在此符号下面写出该加的词。
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。
Attention, please．We had received the weather forecast over
the radio that there will have a heavy rain tonight．Be sure to shut the
windows and doors before you leave their classrooms．Tomorrow it
will keep raining．The sports meet that we planned to hold it tomorrow
will be put down．After it becomes fine, we'll make another announcements．
We will have classes as usually．It will be cold and rainy tomorrow
but you'd better put more clothes in time．Don't keep your umbrellas open
while ride if you come to school by bike．It is very dangerous．