9. The authors of the book The Natural Approach: Language Acquisition in the Classroom are _______.

A. Chomsky and Terrell                                  B. Krashen and Halliday

C. Krashen and Terrell                                    D. Chomsky and Krashen

10. The formula i+1 put forward by Krashen means input that contains structures _______ the learner’

s present level.

A. greatly above                                             B. greatly below

C. somewhat above                                        D. somewhat below

11. According to the affective filter hypothesis, which of the following is NOT an affective variable related to second language acquisition?

A. Motivation.                                                B. Self-confidence.

C. Anxiety.                                                    D. Vocabulary.

12. Which one of the following activities is NOT included in the acquisition activities in the Natural Approach?

A. Affective-humanistic activities.                    B. Problem-solving activities.

C. Skill-getting activities.                                 D. Content activities.

13. In the classroom, the 3DA emphasizes _______.

A. student’s own responsibility of learning        B. teachers’ active role

C. practice and test                                        D. practice and consolidation