Deriving nouns from verbs

The singer's microphone cut out during his _____________of the national anthem. (perform)

Many children benefit from doing ___________word puzzles. (challenge)

Out of the original fifty _________, only eight made it to the final interview round. (apply)

The ___________of three extra names on the list surprised us. (include)

The ____________went well; all the actors know their lines now, so we're closer to being ready for a performance. (rehearse)

The ____________ of the factory into a school took a year. (transform)

We still haven't recieved any ____________ of the booking. (confirm)

There was ___________ in the classroom regarding the new grammar topic. (confuse)

There's a new ___________opening at the gallery in town tonight. (exhibit)

The teacher will make an _________of the student's current ability before letting him join the class. (evaluate)