Fill in the blanks It is to be hoped that we shall often have the ___________…

Concept: In a single-blank vocabulary-in-context question, the blank must be filled with the near-synonym whose built-in connotation matches the specific sense the sentence sets up, not just any loosely related word. ‘Opportunity’, ‘chance’, ‘avenue’, and ‘prospect’ all touch on future possibility, but differ in whether they denote a favourable occasion, a matter of luck, a route/means, or a mere expectation.

Application: The sentence hopes that ‘we shall often have the ___ to witness this interesting work’ — that is, a favourable, recurring occasion on which to personally see a valuable musical performance. ‘Opportunity’ means precisely a favourable occasion or circumstance that allows something desirable to happen, which is exactly the sense of a hoped-for occasion to witness the work.

Cross-check: Plugging ‘opportunity’ back into the sentence confirms the logic: hoping to often have a favourable occasion to witness a valuable, rarely-seen musical work reads naturally. Each remaining option breaks down on its own meaning:

• ‘chance’ — places its emphasis on mere possibility or luck rather than on a specifically favourable, fitting occasion; it is not ungrammatical here, but it is a looser, less precise fit than the sentence's hoped-for, positive register calls for.

• ‘avenue’ — denotes a route or means toward achieving a goal (as in ‘an avenue for improvement’), not a point-in-time occasion for witnessing an event, so it does not match the sentence's sense.

• ‘prospect’ — denotes a future likelihood or expectation, not an actual occasion on which one is present to witness something, so it does not complete the sentence correctly.