It took the builders about 15 yuars to finish that big project.这句话是用It做形式主语

It took the builders about 15 yuars to finish that big project.这句话是用It做形式主语

题目
It took the builders about 15 yuars to finish that big project.这句话是用It做形式主语
那如果不用It作形式主语该怎么说?
答案
还有一种表达是:
The builders spent about 15 years (in) finishing that big project.
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