These vocabularies are the words that many students make a mistake;
“graduate”students in first year make mistake for 8 and fourth year for 3 students. “railway” students in first year make a mistake for 8and fourth year for 3 students. “gasoline” students in first year make a mistake for 2 and fourth year for 3 students. “petrol” students in first year make a mistake for 5 and fourth year for 2 students. “pub” students in first year make a mistake for 6 and non-fourth year students.