Odpowiedź :
I phoned you yesterday.
What were you doing?
What time did you phone?
I was watching soap opera at that time.
That's why I didn't hear the phone.
I called you because I'm going to the mountains for the weekend.
I skied a lot before the accident.
I didn't know about the accident!
I was skiing down a slope when I collided with another skier and I broke my leg.
Before the accident I was very good at skiing!
Вот так.