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.
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单项选择题
A．People marry at a much later time.B．More birth control devices and methods have been used.C．Women would rather go to study or work than have children.D．All of the above.
A．People marry at a much later time.
B．More birth control devices and methods have been used.
C．Women would rather go to study or work than have children.
D．All of the above.
单项选择题
A．He bought them from Henry.B．He bought them at a bookstore.C．He found them lying in a quiet street.D．He took them from a car.
A．He bought them from Henry.
B．He bought them at a bookstore.
C．He found them lying in a quiet street.
D．He took them from a car.
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