Smart cars, intelligent highways

Sentences
●I was chatting with luisa all day.
●I spent many time trying to decipher the messege. 
●thousands of children perish each year becouse of rapes.
●my cosina had severity accident today, but he died.
●they have a happy yet humdrum relationship.
●I wasn't able to pinpoint the source of noise.

This lesson was very important becausencia I learn so much abaut smart cars that I didnt know.