1.翻译句子你是李明吗?
空不对吧Are you Li Ming 或 Is your name Li Ming?
2.Speaking Russian in China is very hard.改为同义句
It's very hard to speak Russian in China.
it's +adj.+to do sth 做某事.
3.He showed great interest in learn English.改为同义句
He was interested in learning English.
be interested in 对...感兴趣