（）refers to varieties of language defined by their topic and context of use.

填空题The attitudinal and emotional factors can be expressed in an item of vocabulary. These are often referred to as（）.

填空题The three main things that a learner has to acquire when learning a new structure are the form, meaning and（）of the structure.

填空题“Knowing English” must mean knowing how to（）in English.

填空题The cardinal rule means（）.

填空题If the aim of a lesson is “To learn the names of colours” the lesson may focus on a particular（）.