Choose the correct preposition. 1. gillian left home early so that she wasn't late for/at the meeting. 2. the manager was very satisfied with/for her staff's efforts during the sale. 3. the surgeon had to operate in/on the patient immediately. 4. linda's work experience made her the most suitable candidate to/for the job. 5. all of the staff are hard at/to work in the chosolate factory.