You can count on it being standard German. The Purpose of reading simple sentences is to begin to get the feel for German word order, build your vocabulary, and learn German grammer. Read the same sentences over everyday. You are not some genius who can read them once and know everything they can teach you. Learn to Speak German Learning to speak German correctly is hard enough if you have a good native German teacher.
Few people have that opportunity.
If you have access to a library try to borrow some records or tapes. I found a CD-ROM which allows me to speak into a microphone while listening to the German native and then play back the digital sound of my voice following the German voice. Notice that Section 400 of this site begins with pronunciation of German letters. Notice that each lesson of Section 400 begins with a simple German text and has the meaning and pronunciation of each word . Learn the 1000 Most Common German Words.