Simple past vs. Present Perfect

I ____ (work) for the company for only three years, but I'm already a senior manager.

I __ (go) on a training course during my first month at work, but I _____ (not go) on one since then. [USE A COMMA TO SEPARATE ANSWERS]

My first boss __ (be) very friendly, but she _____ (leave) the company last year and I ___ (not see) her since she __ (go). [USE COMMAS TO SEPARATE ANSWERS]

They _____ (change) the way we work completely in the last six months. Now we have flexible working, whereas before we _____ (start) at nine and ______ (finish) at five. [USE COMMAS TO SEPARATE ANSWERS]

In 2004, they ____ (post) him to Japan. He __ (be) there ever since, and during that time, he ___ (get) married and _____ (start) a family. [USE COMMAS TO SEPARATE ANSWERS]

I _____ (write) an email applying for the job several days ago, but I _______ (not receive) a reply yet. [USE COMMAS TO SEPARATE ANSWERS]

The company ____ (grow) because we ______ (take on) new staff every year since we ____ (open) in 2005. [USE COMMAS TO SEPARATE ANSWERS]

The profits are higher than we ____.

• have expected

• expected

We can advertise in daily newspapers, as we ____ on many previous occasions.

• have done

• did

I am writing to inform you that the board of directors ____ to introduce identity cards in our department.

• has decided

• decided