1there is a tree before my house.
2there was an unhappy thing happened.
3there seemed as a high buliding in front.
4there are some customers in meeting room.
5.there are some customers taliking in meeting room.
6there is no school in my country before ten yeas.
7there will be an athletic meet next week.
8there must be someone in the office for the lighting.
9there was a serious traffic accident in the street yesterday.
10.there are many people believe that we should be strict to ourselves.