What the element ‘-es’ indicates is third person singular, present tense, the element ‘-ed’ past tense, and ‘-ing’ progressive aspect. Since they are the smallest unit of language and meaningful, they are also（）.

Of the three branches of phonetics, the longest establi...

单项选择题Of the three branches of phonetics, the longest established, and until recently the most highly developed, is（）phonetics.

In English, “pill” and “bill” are （）.A.a phonemic contr...

单项选择题In English, “pill” and “bill” are （）.

As modern linguistics aims to describe and analyze the ...

单项选择题As modern linguistics aims to describe and analyze the language people actually use, and not to lay down rules for "correct" linguistic behavior,it is said to be （）.