It’s essential for a speaker to know________to accomplish in his speech.A、howB、

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问题 It’s essential for a speaker to know________to accomplish in his speech.

选项 A、how
B、whatever
C、what
D、however

答案 C

解析根据句子结构，空格处需填入关系词，既担当动词know的宾语，又担当动词accomplish的宾语。故C项what符合题意，意为“……的东西或事情”。其他三个选项都不符合题意。

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