I must admit I do hold off doing things

I must admit I do hold off doing things like that whenever other people are present.
What does “like that” suggest?

I was to the test.
Is the sentence correct?

I was put to the test.
Is it passive form?

“things like that” means things similar to other things that have already been mentioned or are apparent from context.

No.

Yes.

Some people can’t stand open spaces. That’s called “agoraphobia”. Some people can’t stand closed spaces. That’s called “claustrophobia”. I suffer from the latter. Whenever I travel in a lift, I have to hold myself together just in case I get the urge to shout and scream. I must admit I do hold off doing things like that whenever other people are present. The other day I was put to the test and had to hold on to every bit of self control I had.

Dozy,
I still can’t work out the sentence. Could you please explain the bold sentence?

The link:
english-test.net/lessons/10/index.html

I put off doing things of this nature when there are other people present - I procrastinate over them.

Dose “that” refer “Shout and scream”?

No, it refers to getting into the lift/an enclosed space.