In English, “pill” and “bill” are （）.

Give the description of the following sound segments in English.[k];[z];[w];[u:];[i]

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（）.

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 （）.

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

Duality

protolanguage

locutionary act

In terms of the place of articulation, the following sounds [t][d][s][z][n] share the feature of （）.

inflectional morphemesn