2. 专升本
  3. The number of cemployces at the factory ______ to a minimum so as to lower production costs.

The number of cemployces at the factory ______ to a minimum so as to lower production costs.

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问题 The number of cemployces at the factory ______ to a minimum so as to lower production costs.
选项 A、is cutting
B、are cutting
C、has been cut
D、have been cut
答案C
解析 the number of…表示…的数量，谓语单数，排除B、D，由于数量是被减少，应该用相应的被动态。
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