Robert Frost wrote in both（ ）and the free verse, and sometimes he wrote in a form that borrows freely from the merits of both.
A.blank verse B.sonnet C.rhyming couplets D.the metrical forms正确答案D
Robert Frost wrote in both（ ）and the free verse, and sometimes he wrote in a form that borrows freely from the merits of both.
A.blank verse B.sonnet C.rhyming couplets D.the metrical forms正确答案D
