A. This invention is of great importance to the progress of society. B. It is said that celebration will be postponed to next we

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问题 A. This invention is of great importance to the progress of society.
B. It is said that celebration will be postponed to next week.
C. Our office has recently converted to a new computer system.
D. It’s well-known that education is the foundation of a prosperous country.
这一发明对社会进步有着重要意义。

选项 A、 
B、 
C、 
D、 

答案A

解析
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