【正确答案】：
SEMANTIC CHANGE MEANS AN OLD FORM WHICH TAKES ON A NEW MEANING TO MEET THE NEW NEED. THIS DOES NOT INCREASE THE NUMBER OF WORD FORMS BUT CREATE MANY MORE NEW USAGES OF THE WORDS, THUS ENRICHING THE VOCABULARY.
【题目解析】：本题考查现代英语词汇的发展主要通过三个渠道。旧词新义是指赋予旧词新的含义以满足新的需要。这一方式不增加词的数量，但却创造了词的许多新用法，用以丰富词汇。