单项选择题

It can be inferred from the passage that an important reason for the decision of the United States to build a canal was to （）

A．develop trade relations with Europe
B．improve relations with South American countries
C．prevent European ships from reaching the Pacific Ocean
D．reduce travel time for its ships in case of war

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单项选择题

Which of the following is TRUE（）

A．The international service in August would be as much as in July.
B．The flow of international passengers will be more than that in July.
C．The airport will provide less service than in July.
D．The flow of international passengers will be more than that in usual time.

单项选择题

Which of the following statements best describes the organization of the second paragraph（）

A．Two contrasting views of a problem are presented.
B．An evaluation is explained and then reasons are given.
C．A problem is examined and possible answers are given.
D．Historical view is explained in comparison with the present.