根据句意和汉语提示，填写恰当的短语完成下列句子。

1. ___________(根据) the weather forecast, there will be rain in most parts of China.

2. Yesterday I took Jenny’s dictionary home ____________(错误地).

3. Boys and girls, be careful enough not to____________(落入) the lake.

4. In our free time, I taught her Chinese and she taught me English. ___________(用这种方式), both of us learned a lot.

5. — Why did you come home so late this afternoon?  

    —I met one of my old friends in the street _____________(意外地) and we had a long talk.