A new system of quality control was______to overcome the shortcomings in the firm’ s products.

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问题 A new system of quality control was______to overcome the shortcomings in the firm’ s products.

选项 A、invested
B、informed
C、introduced
D、instructed

答案C

解析 invest：投资，花费，授予；inform：通知，获悉；introduce：介绍，引进，提出；instruct：指导，命令，通知。根据句意可知，选C。

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