I decided to go to the doctor because I was sick.
Why did you decide to go to the doctor?

My last exam was two weeks ago.
When was your last exam?

That pencil is mine.
Whose pencil is that?

I am talking about my english homework.
What are you talking about?

My car is parked around the corner.
Where is your car parked?

I am running in the park. 
Who is running in the park?

Of all the books the small one is mine.
Which of the books is yours?

My phone number is 111-111-1222
What is your phone number?

I was talking during the class and for that reason I didn't pass the test.
Why didn't you pass the test?

My grandmother's name is Mary.
What is the name of your grandmother?