You have to call the person who you want to meet with your doctor, dentist, etc.
Technically, "they have no excuses" is correct because they is a plural pronoun. In speech, you'll hear more people say "they have no excuse", but this is incorrect in light of grammar rules.
i think it is doctor's appointment!!!! :) cause i think that doctor appointment is not that frequently used word!!!!!
He has an appointment, is correct. He had an appointment is the past tense
Something people use to remove the blame from them to make themselves look good