【正确答案】The most important and difficult role that the teacher has to play is to be an organiser. Nowadays many approaches and methods advocate task-based activities. So one of the teacher’ s major tasks is to design and organise tasks that students can perform in the class. It is in doing this that teachers have the most freedom and most challenge, and it is where the teacher can exert creativeness in an unlimited way. Before organising an activity in the class, the teacher should envisage what the activity is going to be like. He should also anticipate problems that may arise when the activity is being carried out. Before students start the activity, the teacher should give instructions clearly and concisely so that students know how to do what. Sometimes a teacher demonstration can help. And if necessary, use students’ native language to clarify. While students are doing the activity, the teacher should walk around the classroom and overhear what the students are saying. If some students are not doing the fight task, the teacher should rectify. Taking notes in mind will help the teacher to provide accurate feedback later.