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单项选择题

案例分析题（61）处应填写（）

A．raise
B．feed
C．watch
D．hunt

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单项选择题Which of following best describes the main idea of the passage ______.

A．Americans are the best served in the world
B．The production of services in America has risen from 25% to 35%
C．Supermarkets have moved in the right direction of self-service
D．Service as an ideal of American people has entered into many fields of lives of Americans

单项选择题Distance learning is different from the traditional correspondence course in that______.

A．it requires the individual student to work alone
B．it enables all the students to work at the same pace
C．it allows students to discuss with one another and their teachers
D．it enables geographically scattered students to study in the same physical classroom