单项选择题

Questions 15 to 18 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now, listen to the passage.
How long did the trip last

A．6 weeks.
B．65 days.
C．6 months.
D．6 months and 5 days.
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单项选择题
he Second World War,______ the earlier one of 1914, prompted public concern about the physical and intellectual well-being of the country’s human resources.
A. so as
B. as were
C. same as
D. as did
单项选择题
The authors of the United States constitution attempted to establish an effective national government while preserving ______ for the states and liberty for individuals.
A. autonomy
B. dignity
C. monopoly
D. stability
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