我估计完成这个项目需要两周时间。

I ___estimate it will take two weeks to finish this project.

根据初步估算，修复这座桥需要大约50万美元。

According to the initial ___estimate, repairing the bridge will cost around $500,000.

我估计这次旅行大约需要花费5000元。

I ___estimate the trip will cost around 5000 yuan.