马上有个英语口语竞赛 我是主持人 请问主持人怎么用英语讲开场白 串词

ladies and Gentlemam ,
May I ask pay attention ,please !
OK , now . I'm Benjamin from grade 3 of #5 high shcool in Beijng and I feel so honored to hold today's competation as a host .
Let me on behalf of the Committee and all judges to announce a rules briefly .
First , speak English only on the stage ;
Second , please give us your name , age , grade and school you are from ;
Third ,a time is limited by 5 min for each player ;
Forth ,don't go away until the judges shown your score ;
Suggest : politely speech would be considered in your score .
Advice : don't be nervous , just do as you usually do .
Shall we start now ( ask the judges )
OK , enjoy this competation !
First one is ....,thank you (if finished), his /her score are 9.8 ,9.7 ,9.5, total is 29;
Now , next is ... ;score 9.5,9.6 ,9.4 ,total is 28.5 .thank you .
...
Now , let me announce a result of this competation .
Third place