English · Verb

The correct answer is 'might as well' because it suggests that, given the lack of interest in mathematics, the speaker sees reading grammar as a reasonable alternative. The phrase implies a decision made due to the circumstances, rather than a necessity or ability. The other options — 'could', 'can', and 'must' — do not fit the context of this choice. 'Could' and 'can' imply ability rather than preference, and 'must' implies obligation rather than a casual decision.

Indicates ability or possibility, but it doesn't convey the sense of making a casual choice based on preference in this context.

Suggests current ability or capability, which doesn't align with the preference or alternative choice implied in the sentence.

This is the correct answer because it implies a choice made due to lack of interest in mathematics. It suggests that reading grammar is seen as a reasonable alternative.

Indicates obligation or necessity, which doesn't fit the context of making a casual choice based on personal interest.