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【題目】The machine has been used many years. It’s no wonder that it doesn’t work well________.

A. regularly B. constantly

C. occasionally D. frequently

【答案】C

【解析】

試題分析：A. regularly定期地，B. constantly 連續(xù)地，不斷地，C. occasionally偶爾地，D. frequently經(jīng)常地，句意：這個(gè)機(jī)器已經(jīng)被使用了很多年，難怪它偶爾不工作了。所以選C。

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