参考答案:[范文] Ladies and gentlemen, This morning we’11 visit the Great Wall.As you know the Great Wall is one of the wonders in the World.It has a history of more than two thousand years.It’s 9:00 now. We’ll arrive at the Great Wall after two hours.We’ll come back at twelve.Our bus will wait for us at the gate.Please remember the number of the bus and be there on time.