the following  web pages link you to different voice synthesisers. They are going to allow you to write texts and to listen the correct pronunciation. It is easy to use it. So let`s use it and improve our pronunciation. The best of all of them  is read the words.

http://www.readthewords.com/

http://www.voiceforge.com/

Read about how to use  read the words

http://blog.batiburrillo.net/2008/03/17/read-the-words-convierte-textos-en-archivos-mp3.htm