【正确答案】：
A.IT DOESN'T HAVE FIXED BEAT OR REGULAR RHYME SCHEME.
B.THE POETIC LINES ARE SIMPLE AND PROSE-LIKE VARYING IN LENGTH WHICH ALLOWS HIM TO EXPRESS HIS IDEAS FREELY.
C.WHITMAN ALSO APPLIES ORAL ENGLISH IN HIS FREE VERSE TO MAKE IT AN EFFECTIVE WAY TO EXPRESS FREELY THE FEELINGS OF COMMON PEOPLE.
【题目解析】：本题考查的是惠特曼“自由诗”的特点。1.它没有固定的节奏或规则的押韵方法。2.诗行简练，类似散文且长短不一，使他能够自由表达自己的思想。3.惠特曼在"自由诗"中也运用了口语使之成为自由表达普通人情感的有效方式。