How do babies recognize different sounds
A) By listening to the sounds. C) By listening to their own babbling.
B) By repeating the sounds. D) By uttering the sounds.

A．he must be exposed to the language
B．his mind must have some input of sounds and words
C．he learns a lot of utterances
D．his mind is busy sorting out the sounds and shapes of words

A．babies begin to learn language while in the womb
B．babies learn language at different stages while in the womb
C．babies develop several stages of language learning while in the womb
D．babies have learned a lot about language while in the womb