It is crucial for us to tell the truth under any circumstances.

[Pink_Flower]

It is crucial for us to tell the truth under any circumstances.

I want this sentence sound natural and formal to use it in a TOEFL exam. Would you please proofread it?

 

[Charlie Bernstein]

It's fine as written.

 

[tedmc]

I want this sentence to sound natural...

 

[emsr2d2]

I might use "under all circumstances".

 

[Yankee]

I would be inclined to use "any circumstance" in your example unless "any" was replaced with "all" per emsr2d2's post.