--- Do you often go to the movies at weekends？--- Not often, I only go to the cinema __________.A.at one timeB.for a timeC.at a timeD.from time to time
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D解析from time to time意思为 “不时；偶尔”，与Not often相吻合。句意：不经常，我只是偶而去看看电影。at one time曾经；for a time一段时间；at a time一次；每次。