Which of the following options correctly fits the blank space in the given sentence?

She advised that I ____ curtail my expenditure.

should

The correct answer is Option (3) → should

The sentence "She advised that I ____ curtail my expenditure." suggests a recommendation or suggestion, which is correctly expressed using "should" followed by the base verb.

• "Should have" → Incorrect, as it indicates a past action that should have happened but didn’t.
• "Shall" → Incorrect, as it expresses future intention rather than advice.
• "Should be" → Incorrect, as "curtail" is a verb, not an adjective or noun that "should be" would modify.

Thus, the correct sentence is: "She advised that I should curtail my expenditure."