During and while are different. They are not interchangeable. Let's see the difference.
We use during to say when something happens. During is followed by noun. Example : during our holiday, during the meeting, during the war, etc. Let's see the following examples.
We use while to say when something happens. While is followed by a clause ( Subject + Predicate ). Let's see the following examples.
In this exercise you have to complete the sentences with during or while.