我写的英语句子正确吗?1:they all sit down when he entered the room.2:th

我写的英语句子正确吗?
1:they all sit down when he entered the room.
2:they all leave when he entered the room.
3:she poke in the hrshness of voces.
4:this is where the river is shallowest.
5;i expect you are receive the gift.
6:he has stolen away many’s boulder
3:she spoke in the harshness of voces. 她说话的声音非常刺耳。