Question

Everybody knows this project will … a great effort. 1. inquire 2. square 3. require 4. Have

Answer 1

Потребует больших усилий -  will 3. require a great effort

Answer 2

The correct answer is 3. require

The sentence should read: "Everybody knows this project will require a great effort."

This means that everyone is aware that the project will demand a significant amount of work and effort.