2. 财经
  3. ______a machine been so efficient and accurate as the electronic computer.

______a machine been so efficient and accurate as the electronic computer.

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问题 ______a machine been so efficient and accurate as the electronic computer.
选项 A、More than ever before
B、Never before has
C、In the past, there never has
D、Formerly there never was
答案B
解析
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