I called a few of my friends.
Why did you call a friend?
I went to the supermarket.(Ask a why question about this)
Why did you go to the supermarket?
I e-mailed my teacher. (Ask a why question about this)
Why did you do so?
I bought a laptop. (Ask a why question about this)
Why did you by a laptop?
I took a few days off from work / school. (Ask a why question about this)
Why did you take some days off from...?
I met Joanne downtown.(Ask a why question about this)
Why did you met her?
I took my car to the service center. (Ask a why question about this)
Why did you take it there?
I bought a digital camera. (Ask a why question about this)
Why did you buy a digital camera?
I logged on to the Internet.(Ask a why question about this)
Why did you log on to the internet?