35.

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

This sentence means that "Suzuki already knows that immersion learning is the key to children's language learning", and the word order of item C is correct.

Item A: Passive voice is an informal expression.

Item B: The error lies in the extra comma.

Item D: The fault lies in A key... cannot be placed at the beginning of the sentence as an apposition of Suzuki.