Вот предложения, нужно их исправить (они все не правельные) (if you want delicious desert you should take special ingredient) (a doctor who prescription for us is very hand some guy) (the doctor told in that flashing his teeth should be part of his regulations)

1. If you want a delicious desert, you should take special ingredients. We use capital letter in the beginning of the sentence. 'desert' is a countable noun, we must use an article in front of it. We must use 'ingredient' in plural, or use an article in front of it otherwise. Full stop at the end of the sentence.

2 The doctor, who made a prescription for us, is very handsome guy. We use capital letter in the beginning of the sentence. Full stop at the end of the sentence. We use the definite article in front of 'doctor' because this non is clearly defined. Prescription is not used as a verb. We use 'to make a prescription' instead. We write handsome in one word.

The doctor told, that flashing one's teeth should be part of one's regulations.