the experiment___,they decided to go on holiday for a week.A.to be finished B.having been finished答案B,为什么?谢谢

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the experiment___,they decided to go on holiday for a week.A.to be finished B.having been finished答案B,为什么?谢谢
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the experiment___,they decided to go on holiday for a week.A.to be finished B.having been finished答案B,为什么?谢谢
the experiment___,they decided to go on holiday for a week.A.to be finished B.having been finished
答案B,为什么?谢谢

the experiment___,they decided to go on holiday for a week.A.to be finished B.having been finished答案B,为什么?谢谢
A 表示等着去完成.(意思是还没动工) B 表示即将完成. 实验即将完成,所以他们决定去度假一周. 所以选 B