根据句意，用所给动词的适当形式填空。
To keep safe, everyone                   (tell) to wear a seat belt in the car now.
If we cut down the trees, floods ______________ (wash) our village away.
The microphone is used to                 (make) your voice sound louder.
All the team members were seen _____________ (train) hard when I passed the room.
Mr. Dong                  (live) here since he was born.