1     (我很高兴)to receive your letter.Now I know     2     (你担心你的汉语) so I give you some advice. 

First,     3     (你应该对汉语感兴趣), for interest is the best teacher. Second, it’s a good idea that     4     (你致力于读更多的汉语书) with interesting stores. Lastly, listen to Chinese songs that     5     (有趣的且吸引人的) and watch Chinese programs on TV as often as possible.Only when     6     (你决心) to learn Chinese well and don’t give up can you make progress. 

Hope my advice is useful to you.

Yours,

Li Hua