CLOZE Question Context

This question presents a fill-in-the-blank scenario, known as a CLOZE test. The goal is to select the most suitable word to complete the sentence:

"This __________ be happening because of institutional features of school systems, such as early streaming,"

The sentence suggests a potential reason or cause for something happening, linking it to specific "institutional features" like "early streaming" within school systems. We need to choose a modal verb that best expresses this possibility.

Analyzing Modal Verb Options

Let's look at the provided options and their meanings in this context:

• 1. ought to: This implies a sense of duty or advisability. It suggests that something is the right thing to do or expected. Example: "You ought to study for the test." This doesn't fit the context of suggesting a possible cause.
• 2. should: Similar to 'ought to', 'should' often indicates probability or expectation, but can also imply advisability. Example: "The train should be here soon." or "You should listen carefully." While it can suggest probability, it might be too strong or imply expectation rather than mere possibility in this sentence structure.
• 3. must: This indicates strong certainty, necessity, or obligation. Example: "He must be tired after the long journey." or "You must finish your homework." Using 'must' here would imply that the institutional features are the definite or only reason, which might be too strong for suggesting a possibility.
• 4. may: This modal verb is used to indicate possibility or uncertainty. It suggests that something is possible or could happen. Example: "It may rain later today." or "You may leave early if you have finished." This aligns well with suggesting that institutional features are a *potential* reason for the event.

Choosing the Correct Modal Verb

Considering the context, the sentence is proposing a possible explanation for an event based on school system features. It's not stating a definite fact or obligation, but rather suggesting a potential link.

The word may perfectly captures this sense of possibility. It indicates that the institutional features are a plausible reason, but not necessarily the only or certain reason. The other options imply a higher degree of certainty ('must') or advisability/expectation ('should', 'ought to'), which do not fit the speculative nature of the sentence.

Therefore, may is the most appropriate choice to fill the blank, expressing that the event is a possibility due to the mentioned institutional features.