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【題目】The machine has been made easier for it __________.

A. to operate B. operated

C. being operated D. to be operated

【答案】D

【解析】句意：這臺機器已經被弄得更容易操縱了。分析句子可知“形容詞+動詞不定式”作主語補足語，動詞不定式中動詞operate與it有被動關系，故用動詞不定式的被動式:to be +過去分詞，故D項正確。

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