21. Rod Ellis (2006) offered some of his own answers to questions about
when and how toteach grammar. Which of the following statements
is not his assertion?
(A) Corrective feedback can facilitate acquisition if itinvolves a mixture
of implicit and explicit feedback.
(B) Explicitgrammar teaching is more effective at the beginning levels
than intermediate to advanced levels.
(C) Both deductive and inductive approaches can be useful,
depending on the context and purpose of instruction.
(D) Both form and meaning should be emphasized; learners need to
have the opportunity to practice forms in communicative tasks.