单项选择题

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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单项选择题

Where does this article probably occur

A．A magazine.
B．A physics textbook.
C．A physics report.
D．A government document.

单项选择题

Heisenberg did not leave Germany during the Second World War because he ________.

A．supported the Nazi regime
B．wanted to contribute to the German physics
C．was not sympathetic for the Nazi regime
D．wanted to develop a nuclear reactor in Germany