Why did you break it into different sentences?
Indeed, if you are adding audio to the slide itself, you may only use one audio clip. So if you want all the sentences in once clip, record them separately and save them individually. Then add the first sentence to the slide. Open the audio Editor and import the remaining sentences to form a single larger clip.
You could insert one Text Caption for each sentence and add the audio clip to the caption. You could configure them as transparent with no text and adjust their timing and placement on your timeline.
I wanted information to come into the slide at different times. So a sentence would fly in and I wanted audio to be read with that sentence. Then another sentence would fly in and different audio would be with that sentence. I made different text boxes for each sentence I wanted to fly in. I did figure out you can add the audio to each text box seperately and it works perfect.
Thanks so much, I did figure out how to add the audio to each text box. Thanks for your response!