【正确答案】A task is a piece of classroom work that involves learners in comprehending, manipulating, producing or interacting in the target language while their attention is focused on mobilizing their grammatical knowledge in order to express meaning, and in which the intention is to convey meaning rather than to manipulate form. The task should have a sense of completeness, being able to stand alone as a commnunicative act in its own right with a beginning, a middle and an end.
A task has five major features: 1)meaning is primary; 2)learners are not given other people's meaning to regurgitate; 3)there is some sort of relationship to comparable real- world activities; 4)task completion has some priority; 5)the assessment of the task is in terms of outcome. These features are closely related to each other and help define task quite well.

【答案解析】[解析] 本题主要考查任务教学法的相关内弈，答题时要先说明什么是task，然后再进一步说明task的主要特征是什么。