Complete the following statements with proper words or expressions according to the course book.The user-friendly features of Longman Dictionary of Contemporary English are its clear grammar codes, ( )and language notes.
【正确答案】：USAGE
【题目解析】：《朗文当代英语词典》的用户友好的特性是其明确的语法规范，使用注释和语言注释。
Complete the following statements with proper words or expressio
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