九年级英语同义句转换1.The question was so difficult that i didn't konw

九年级英语同义句转换
1.The question was so difficult that i didn't konw how to answer.
The question was _____ _____ _____ _____ _____ answer.
2.Wang Hong wants to improve her listening skill.She listens to the radio.
Wang Hong wants to improve her listening skill _____ _____ to the radio.