单项选择题

A．1.
B．2.
C．3.
D．4.
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填空题
The last paragraph of the passage indicates that ______.
单项选择题
A．He knew this beforehand.B．He judged from time zones.C．He made such a judgment so as to Wang.D．He gave such an explanation because he analyzed the speeds of sound and electricity.
A．He knew this beforehand.
B．He judged from time zones.
C．He made such a judgment so as to Wang.
D．He gave such an explanation because he analyzed the speeds of sound and electricity.
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