The first recognizable sounds are described as c_____, with vela

The first recognizable sounds are described as c_____, with velar consonants such as /k/ and high vowels such as /u/usually present.
【正确答案】：cooing
【题目解析】：The first recognizable sounds are described as cooing, with velar consonants such as /k/ and high vowels such as /u/usually present.