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[材料题]

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.

单项选择题1.据说庆典将延期到下周。
  • B
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单项选择题2.这一发明对社会进步有着重要意义
  • A
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单项选择题3.众所周知,教育是兴国之本。
  • D
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单项选择题4.最近我们]办公室更换了新的电脑系统。
  • C
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