'closing question' is correct and can be used in written English.
For example, "I hope this provides adequate information. Do you have any other questions before we close?".
MS. RADDATZ: I'm going to move on to this closing question because we are running out of time.
And with his famous closing question—"Are you better off than you were four years ago?"—he defined the campaign as a referendum on the incumbent's record.
10.32 A closing question to each candidate: what fundamental question should each answer to prove that they are worthy of being president?
His closing question ("Why aren't more white people trying to pass as black?"), however, seems to miss what's happening on the streets from Phoenix to Buffalo, and from Villiers-le-Bel to the council estates of the United Kingdom.
When town hall participant Karl Becker got the closing question in the second presidential debate, I was thrilled to see him ask the same question I had submitted to the openquestionforum.org the prior week.
That leads to the closing question.
They ask closing questions with confidence.
I will leave you with these closing questions... Are you stalling on your business?
Closed question results are presented by subject.
Even though closed questions using disease-related terminology might elicit previously unmentioned health changes, closed questions using non-disease terminology did so more effectively.
The following data-collection techniques were used: surveys, open questions, closed questions, and dichotomous questions.
