As a skilled technician, Mr. Butler has comprehensive______of the computer software programs.

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问题 As a skilled technician, Mr. Butler has comprehensive______of the computer software programs.

选项 A、opinion
B、knowledge
C、ability
D、collector

答案B

解析词汇：名词1．这是一道词汇选择题，选项均为名词。2．comprehensive knowledge意为“广泛的知识”，因此(B)为正确选项。

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