The sentence “The baby smiled.” is a（）.

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

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 （）.

A sentence is a （） concept, and the meaning of a sentence is often studied in isolation.

In English, “pill” and “bill” are （）.

The word “photographically” is made up of 5 morphemes.

A general difference between phonetics and phonology is that phonetics is focused on the production of speech sounds while phonology is more concerned with how speech sounds distinguish meaning.

According to the ways antonyms differ, how many groups can we classify antonyms into?

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（）.

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