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Protocol was______enabled him to make difficult decisions without ever looking b
Protocol was______enabled him to make difficult decisions without ever looking b
游客
2023-10-27
58
管理
问题
Protocol was______enabled him to make difficult decisions without ever looking back.
选项
A、who
B、what
C、which
D、that
答案
B
解析
表语从句题。本句为主系表结构,表语从句中缺乏引导词,且从句中缺少主语,what可以引导表语从句,并同时在句中作主语,因此应选B项。A项中who可以引导表语从句,但指人,而本题中指物,故排除;which一般用于引导定语从句、主语从句和宾语从句,在引导表语从句时,不能直接充当主语,故排除;that可以引导不缺少句子成分的表语从句,而此句中表语从句缺少主语,故that不符合此处语法,可排除。
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