past simple vs present perfect to talk about experiences

Past simple v Present perfect PAST SIMPLE   We use the Past Simple tense to talk about a definite finished time in the past I wrote a letter yesterday I wrote a letter at o'clock I wrote a letter last Monday I wrote a letter several weeks ago PRESENT PERFECT      Although we can use time phrases with the present perfect, often we don't even know exactly when the action happened I have written a letter I have been to France I have worked as a chef before http://www.youtube.com/watch?v=vN7pP -5M2nU EXAMPLES     Here is part of an application letterHighlight the two tenses Dear Ms Small, I am interested in applying for the post of junior secretary I have recently completed a BTEC in business studies During my course I went on a number of work placements I have also completed a Level typing course In my summer holidays I worked in a small business as a trainee secretary I contacted them during my course and they were keen to offer me a job during the summer ANSWERS    Dear Ms Small, I am interested in applying for the post of junior secretary I have recently completed a BTEC in business studies During my course I went on a number of work placements I have also completed a Level typing course In my summer holidays I worked in a small business as a trainee secretary I contacted them during my course and they were keen to offer me a job during the summer ACTIVITY   Correct or incorrect- are the following sentences written correctly Come to the board and mark the mistakes, or give them a tick if they are correct CORRECT OR INCORRECT? I have worked in a restaurant last year  I worked in a restaurant last year CORRECT OR INCORRECT? I have never studyed French  I have never studied French CORRECT OR INCORRECT? I worked as a waitress in 1998  I worked as a waitress in 1998 CORRECT OR INCORRECT?  She has completed a computer course last year  She completed a computer course last year CORRECT OR INCORRECT? I went to Southend Adult Community College last year  I went to Southend Adult Community College last year CORRECT OR INCORRECT?   During my course I visited Italy twice I have never be to Spain though During my course I visited Italy twice I have never been to Spain though CORRECT OR INCORRECT? I have done a range of part time jobs since I left college  I have done a range of part time jobs since I left college C.V’s  Now we are going to work on writing a C.V [...]...CORRECT OR INCORRECT? I went to Southend Adult Community College last year  I went to Southend Adult Community College last year CORRECT OR INCORRECT?   During my course I visited Italy twice I have never be to Spain though During my course I visited Italy twice I have never been to Spain though CORRECT OR INCORRECT? I have done a range of part time... have never been to Spain though CORRECT OR INCORRECT? I have done a range of part time jobs since I left college  I have done a range of part time jobs since I left college C.V’s  Now we are going to work on writing a C.V .. .PAST SIMPLE   We use the Past Simple tense to talk about a definite finished time in the past I wrote a letter yesterday I wrote a letter at... weeks ago PRESENT PERFECT      Although we can use time phrases with the present perfect, often we don't even know exactly when the action happened I have written a letter I have been to France... went to Southend Adult Community College last year  I went to Southend Adult Community College last year CORRECT OR INCORRECT?   During my course I visited Italy twice I have never be to Spain