Firms that use computers have found that the number of staff_______ is needed fo

游客2024-09-09  7

问题 Firms that use computers have found that the number of staff_______ is needed for quality control can be substantially reduced.

选项 A、whose
B、as
C、what
D、that

答案 D

解析 题中修饰staff的定语从句中缺少主语,而D项that既可连接定语从句,又可充当从句中的主语,用来指人,符合题意。
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