n terms of onomatopoeic words,which of the following statements can be regarded as the truth?（
A.English onomatopoeic words can be used as verbs,adjectives,adverbs,nouns and modifiers.
B.In fact they are used most frequently as nouns and verbs,the two most forceful word classes.
C.Onomatopoeic words are large in number in English and they are very active.
D.The grammatical functions they can serve include the subject,the predicate,the object,the attribute and the adverbial.