【单选题】The third paragraph is mainly about ______.
A．the development of babies' early forms of language
B．the difficulties of babies in learning to speak
C．babies' strong desire to communicate
D．babies' intention to communicate
【单选题】The third paragraph is mainly about ______.
A．the development of babies' early forms of language
B．the difficulties of babies in learning to speak
C．babies' strong desire to communicate
D．babies' intention to communicate
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