根据句意，用所给动词的适当形式填空。
小题1:To keep safe, everyone (tell) to wear a seat belt in the car now.
小题2:If we cut down the trees, floods ______________ (wash) our village away.
小题3:The microphone is used to (make) your voice sound louder.
小题4:All the team members were seen _____________ (train) hard when I passed the room.
小题5:Mr. Dong (live) here since he was born.