while
- While my mother________ some washing, I was making a kite for Mary.
- While she was trying to pass a truck before her, she __________ another car coming.
- While he_____ on the phone, a man walked into his room.
- While she_____ on the phone, a man walked into her room.
- While Helen ________ the piano，her mother came in．
- While the alien ________ the museum, the boy called the TV station.
- While she, she cut herself.
- While Ann ___ TV, her father came home.
- While the alien _______ a souvenir, the girl called the police.
- While I ______ with Lily, the school bus came.