All the hard tasks______because of their joint effort, they decide to go on holi

游客2023-11-16  40

问题 All the hard tasks______because of their joint effort, they decide to go on holiday for a month.

选项 A、have been fulfilled
B、having been fulfilled
C、were fulfilled
D、having fulfilled

答案 B

解析 该题是语法结构题,考查分词的独立主格结构。句中用“名词+现在分词完成被动式”独立结构来表示时间“在他们的共同努力下所有艰难的任务都完成了之后”。如选A,第一分句后不能用逗号,必须用句号或分号。如选C,除了与A一样标点符号不对外,时态也不对。D项是主动语态,不能用于该独立主格结构中。因此,根据题意和语法规则,选项B为最佳答案。
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