Question

Over and over again he rehearsed it in wearisome _____ until it had assumed a certain and almost invariable form.

A)Expose.
B)Expenditure.
C)Repetition.
D)Option.​

Answer 1

Over and over again he rehearsed it in wearisome repetition until it had assumed a certain and almost invariable form.

Hence the answer is :

(c) Repetition