【题目】As is known to all language learners, newly learnt words will soon be forgotten unless ______.
A. exactly B. finally C. frequently D. gradually
在线课程【答案】C
【解析】
试题分析：考查副词词义辨析。句意：语言学习者都知道，新学的单词会很快忘掉，除非反复记忆。Exactly正是；finally最终；frequently频繁地； gradually逐渐地；根据句意，故选C项。