帮我检查下英语书信错误

Dear Lu
How are you doing?I hope you are well!
Uh huh!I'm pleased to say that I have recoverred from the bad cold.What a bad cold I've ever had!My body temperature has reached nearly 39 degrees with an awful cough.All of those symptoms last almost two weeks,however,it's amazing during the time I didn't feel too bad.I suppose that perhaps I'm determined-minded.Spring is a season which would always make people to be weak easily.Thus please take care.
Life in this term,I think,is not easy.I have much more classes than before.There are just 3 empty classes in a weekday,in the meantime,I have to go to the Communist Party Sparetime Classes at weekends.Also,the hard time always makes me feel depressed and exausted.Otherwise may be it's still not even half as hard as senior 3 yet.Hence I am able to understand how busy your life would be.I always agree with what people say that senior 3 is the hardest time in one's life.Consequently you should not only attend your study but care more about your health,including a healthy diet all the time.But it's easier to say than to do,therefore just try your best to blance them.Good health condition can ensure your study to be smooth,which will make me happy as well.
I've just passed CET-4 but now I'm seeking further.I'm going to participate in CET-6.I know CET-6 is so much more difficult than CET-4.But there is an old saying"there is no royal road to learing."May be I have no other way to choose.Besides,hopely you might wish to make a wonderful wish for me!
I know you've just finished PETS-2 listening test.I'm expecting your good news.
The marathon race is going to sprint,the finish line is at the sight.I'm fully convincing that finally you can make it.Because you are the best runner!
With best wishes
Elly
以上是我帮你修改过以后的信件,有了best wish 还放yours sincerely可以说是画蛇添足.这两个属于同一类语言,只放一个就够了.通篇还不错,但词藻之间连接略显生硬,显然缺乏语感.