There is no one absolutely correct way to draw up a lesson plan and each teacher will decide what suits him or her best, but all good lesson plans give a clear picture of what the teacher intends to do in the lesson.（）

If the teacher uses the same techniques, some students may not have the chance to learn in the way that suits them best.（）

Lesson plans are useful only before the lesson.（）

At each stage of the lesson, activities focus on all four skills.（）

The stages of a lesson overlap.（）

Usually a lesson should focus on practicing one single skill so that the students can develop that skill successfully.（）

A normal lesson should have the all the stages discussed in this unit and the stages should be in fixed order.（）

One function of a language can only be expressed by one structure.（）

The natural order hypothesis is presumed by Krashen to be the result of the learned system, operating free of conscious grammar.（）

For Krashen, the affective filter is the principal source of individual difference in second language acquisition.（）