In 1860, the Philological Society launched its effort to create a dictionary more comprehensive than the world had ever seen; although the project would take more than 60 years to complete, the Oxford English Dictionary had been born.

1- would take more than 60 years to complete, the Oxford English Dictionary had been

2- took more than 60 years to complete, the Oxford English Dictionary was

3- would take more than 60 years to complete, the Oxford English Dictionary was being

4- would take more than 60 years to complete, the Oxford English Dictionary was

5- took more than 60 years to complete, the Oxford English Dictionary was about to be