Can you practice Pronunciation by Listening to This Story?

... to the sounds of English.  Then, as you speak, listen to your own English and check for funny sounds, or trouble spots.  Those are the spots you can practice to improve.
Listen to the story.  Then, read the story, and listen to yourself say it.  As above in number one, you can compare your version to the recorded version.  Even better, record yourself saying the story.  Listen to that, and look for things to improve.  Coach yourself.
After you listen to the story many times, download a free audio recorder for your computer (like Audacity), and then do use it to record yourself reading the text out loud.  Then play it back at the same time as you play the recording on this site.  Listen for big differences.  

Also, this will force you to read at my speed; that is excellent practice.

Pronouncing 'L' and 'R'
I used to tell my students that they did not need to practice pronunciation if they could use English patterns similar to native speakers.  Now, I have changed and give a little help in this area.  There are a few reasons: it may be easier to improve pronunciation than to learn the many English speaking patterns (for instance, many Japanese use the exression to leave much more than a native English speaker would... this is difficult to correct), it improves students' confidence, and there are a few times when it can be important.  Also, it may increase your audience's respect for you if you speak without a strong accent.