Tense and reference are two terms often encountered in the study of meaning.

All words may be said to contain a root morpheme.

判断题All words may be said to contain a root morpheme.

Consonant sounds can be either （）or（）,while all vowel s...

填空题Consonant sounds can be either （）or（）,while all vowel sounds are （）.

To many people,a linguist is the same as a （）,one who c...

填空题To many people,a linguist is the same as a （）,one who can speak several languages fluently.