Fill in the blank with the appropriate Modal.
I ________ pass my examination because my parents have toiled a lot for my education.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → have to
Complete sentence: I have to pass my examination because my parents have toiled a lot for my education. Because of their hard work, passing is something the speaker must do, so "I have to pass my examination".
| Option | Meaning and use | Example |
|---|---|---|
| (1) can | Can expresses ability. The parents' hard work is a reason for an obligation, not for an ability. | – |
| (2) could | Could is past ability or a polite or uncertain possibility. It does not express the duty the sentence needs. | – |
| (3) have to (answer) | Have to / has to expresses necessity or obligation, often one that arises from the situation. The reason clause shows the obligation: the parents have toiled a lot for the speaker's education. | I have to reach the office by nine every day. |
| (4) may | May expresses possibility or permission. "I may pass" is only a guess and does not follow from "because my parents have toiled". | – |