A．traditionalB．backwardC．classicalD．advanced

【C9】A．detailB．returnC．advanceD．consequence

【C7】A．adviceB．adviseC．advocateD．advance

【C18】A．powerfulB．creativeC．imaginaryD．advanced

【C5】A．behindB．backwardC．aheadD．forward

【C11】A．laggardB．unpracticalC．advancedD．advancing

Phrase structure rules, such as S→NP＋ VP, derive from______grammar.A．traditionalB．function