Correct the errors in the following sentences. 1 They didn't see each other since September. 2) Gina is in college for one year. 3) She has worked at the cafeteria since nine months. 4) He always arrived at his office on time before. 5) He never had a problem with his boss. 6 Did you ever take the telephone orders before? 7) In the last three months, Robert trained more than twenty new employees. 8) Robert has started to use a computer when he was an office worker. 9) Robert attended several important business meetings in the last three years. 10) So far they already got six traveler's checks