Linguistic dictionaries usually cover such areas as（）.
A、spelling and pronunciation
B、meaning and grammatical function
C、usage and etymology
D、all the above
【正确答案】：D
【题目解析】：Linguistic dictionaries usually cover such areas as spelling, pronunciation, meaning, grammatical function, usage and etymology, etc. 语言词典通常包括拼写、发音、意义、语法功能、用法及词源等这些方面。
