1.I eat a lot of chocolate (chocolate doesn't need to be plural when you are speaking of a general intake).
2.Due to the fact that she is putting on weight, she has decided to/had to reduce her food intake.
3.I am affected with red eyes (Congivitis). I suffer a severe ache in both of my eyes.
4.I jumped a red light and I think I was caught by a speed camera. Unfortunately, I might have to pay a fine of 500Dhs.
Number 4 is written in a particularly British manner and may not be appropriate outside the U.K.
I'm not a teacher.
Student or Learner