单项选择题

A．On the first day of class.
B．At the end of the first week of classes.
C．Halfway through the semester.
D．Just before the final examination.
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单项选择题
A．It led to many other inventions.B．Man had no use for it then.C．There were no wheels in nature.D．All of the above.
A．It led to many other inventions.
B．Man had no use for it then.
C．There were no wheels in nature.
D．All of the above.
单项选择题
A．That he wants something to eat.B．That he will tell them.C．That he is not hungry.D．That he is angry.
A．That he wants something to eat.
B．That he will tell them.
C．That he is not hungry.
D．That he is angry.
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