________ I was walking to the store, I saw an old friend.

• When

• While

The kids were playing in the park ________ it started to rain.

• when
• While

________ he was fixing the car, the phone rang.

• while
• When

She was cooking dinner ________ the doorbell rang.

• when
• While

________ we were on vacation, the weather was beautiful.

• when

• While

The teacher was explaining the lesson ________ the students took notes.

• when
• While

________ they were having dinner, the lights went out.

• while

• When

I was reading a book ________ the train arrived at the station.

• when
• While

________ the storm was raging outside, we were sitting by the fire.

• while

• When

The children were making noise ________ I was trying to concentrate.

• while
• When