2. 外语
  3. This firm has found that the number of staff _____ is needed for quality control can be substantially reduced since it uses comp

This firm has found that the number of staff _____ is needed for quality control can be substantially reduced since it uses comp

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问题 This firm has found that the number of staff _____ is needed for quality control can be substantially reduced since it uses computers.
选项 A、whose
B、as
C、what
D、that
答案D
解析 考查关系词的使用。本题中staff后的定语从句中缺少主语，而that既可连接定语从句，义可充当从句中的主语，用来指人，符合题意。
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