His attitude obstructs the progress of the project.

His irresponsible behavior brought about a big problem.

That problem is causing trouble with the progress.

We are making progress on the project.

The progress of this project is going smoothly.

Can you answer this question?

The chord progression of this song is very unique.

The speed of this progressive wave is close to the speed of light.

A new approach is needed to solve this set of problems.

The main problem with this project is the lack of communication.