多选题Children first acquire the sounds in all languages of the world, no matter what language they are exposed to. （ ）多选题There is certain sequence in which children acquire the sounds. （ ）多选题Language acquisition refers to a child’s acquisition of his mother tongue and second language. （ ）多选题The interactionist claims that the modified language which is suitable for the child's capability is crucial in his language acquisition. （ ）多选题Traditional behaviorists view language as a kind of behavior and believe that language learning is simply a matter of imitation and habit formation. （ ）多选题The capacity to acquire one’s first language is a fundamental human trait that all human beings are equally well possessed with. （ ）多选题Under-extension happens when a child takes a property of an object and generalizes it. （ ）多选题Cognitive development shapes language acquisition. （ ）