【題目】The machine has been used for man years. It’s no wonder that it doesn’t work well __________.

A. regularly B. constantly

C. frequently D. occasionally

【答案】D

【解析】

試題分析：考查副詞的使用及句意的理解。句意：這臺機(jī)器已經(jīng)被用過好多年了，難怪它偶爾會不好好運(yùn)轉(zhuǎn)。A. 有規(guī)律地； B. 不斷地；C. 頻繁地； D. 偶爾地，故D正確。

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