错：I feel very painful in my right hand。

My right hand is very painful. Or “ My right handhurts(aches)。”

20. 他看到她很惊讶。

错：He looked at her and felt surprised。

He looked at her in surprise。

21. 我读过你的小说但是没料到你这么年轻。

错：I have read your novels but I didn't think you could be soyoung。

After having read your novel, I expected that you would beolder。