Referring to time

Complete the following sentences taken from cover letters using a correct adverbial phrase from the list
1. team leader at Global Computers, I introduced new quality control procedures resulting in a 50% fall in customer complaints.
2. at Legal Solutions, I was responsible for marketing software services.
3. degree course in Business Studies, I worked for three months in the Data Processing department of a large computer corporation, experience in IT solutions.
4. Star Enterprises I gained some knowledge of accounting, assisted their bookkeeper for three months.
5. I have been responsible for the organisation of conferences. my knowledge and experience in this field have grown considerably and now I feel capable of managing events independently.
6. people every day in a business setting, I have developed strong interpersonal and communicative skills.