20. For a pre-service teacher, observing some effective sequence of activities in a language classroom is helpful. Which of the following statements is Not the most necessary one in instruction at the beginning level class?
(A) A focus on the forms of language and analyze language forms.
(B) The teacher asks students questions about their lives and has a small talk.
(C) The teacher corrects students’ errors.
(D) Students are directed to work in pairs and respond appropriately.