一道语法填空题

Museums make their unique contributions to society since 1997, each year about May 18, International Museum Day (celebrate ) ,with the aim of increasing public awareness about roles of museums in developing society, museums are an important means of cultural exchange.

这里面的答案是 is celebrated 和 because. 我自己做的答案是 has been celebrated 和 whose. 不知道自己的答案是否可行，来求证一下各位老师。再者我觉得第一个空不管填以上的哪两个答案都似乎有点问题，因为第一个空前后貌似缺了连词，应该是填非谓语的形式。希望老师给我解答一下，感谢老师！

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分类：高中水考

最佳答案 2020-03-31 01:36

Museums make their unique contributions to society since 1997, each year about May 18, International Museum Day is celebrated, with the aim of increasing public awareness about roles of museums in developing society, because museums are an important means of cultural exchange.

网友现在的句子，是不是让出题者把原句篡改而成？还是自己抄写错误？

1. 时态正确吗？看红色部分。since 1997 如果不是修饰 make，为何不加逗号隔开，另开一句？

2. each year about May 18，是since 范围的时间。还是与since 无关？

3. roles of museums 还是 the roles of museums？

这一部分，直接乱了套。

（原句）Museums make their unique contributions to society since 1997, each year about May 18, International Museum Day is celebrated,

（修改后）Museums make their unique contributions to society. Since 1997, each year about May 18, International Museum Day is celebrated,

本句用一般现在时 is celebrated，没错，它的时间状语是 each year about May 18，而 Since 1997 是限制each year about May 18 的。

第二个空填 because 很对。填 whose 是society 的定语从句吗？图书馆是“社会的”？