In 1961,Yuan Longping found a natural hybrid rice plant that had many a over others.
Finally，the police officer caught the thief. （改为被动语态）
Finally，the thief by the police officer.
I spent an hour at the station waiting for the train. （改为同义句）
It me an hour wait for the train at the station.
Daisy ran very fast when she was young. （改为一般疑问句）
Daisy very fast when she was young？
Linda thinks it's easy to write Chinese words. （改为否定句）
Linda it's easy to write Chinese words.
I have been learning English for over 9 years. （对画线部分提问）
have you been learning English？