单项选择题


Passage One
Questions 16 to 18 are based on the passage you have just heard.

A．On Saturday and Sunday summer mornings.
B．On Saturday and Sunday winter mornings.
C．On Saturday and Sunday summer afternoons.
D．On Saturday and Sunday winter afternoons.
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单项选择题
A．How did both the Constitution and democracy become so workable and sustainableB．How did both the Constitution and republic become so workable and sustainableC．How did the system of democracy become so workable and sustainableD．Not given.
A．How did both the Constitution and democracy become so workable and sustainable
B．How did both the Constitution and republic become so workable and sustainable
C．How did the system of democracy become so workable and sustainable
D．Not given.
单项选择题
A．A space rocket can only be used once.B．The pilot can fly a space plane just like an ordinary plane.C．A space rocket travels much faster than a space plane.D．Both A and B.
A．A space rocket can only be used once.
B．The pilot can fly a space plane just like an ordinary plane.
C．A space rocket travels much faster than a space plane.
D．Both A and B.
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