When / While / As

____ John was driving home, he saw a great accident.

• When

• While

_____ I called home, my brother picked up the phone.

• When

• While

We were talking _____ my mother was listening our conversation

• While

• When

We were eating _____ he called.

• When

• While

_____ he called me, he was driving to work.

• While

• When

_____ he watches television, she reads book.

• When

• While

_____ I was making dinner, my sister was watching TV.

• While

• When

We were watching the movie called "Harry Potter" _____ a friend came over.

• When

• While

_____ I was talking on the phone, my friend was reading magazines.

• When

• While

We saw nothing but leaves and branches _____ he opened the front door.

• When

• While