You ______ to study hard if you want to pass your exams. have should supposed must

To correctly fill in the blank in the sentence "You ______ to study hard if you want to pass your exams," we need to determine which word indicates necessity or obligation.

Analysis of Options:

1. have - This word suggests ownership and does not fit well in terms of obligation.
2. should - This word carries a suggestion but lacks the strength of obligation required in this context.
3. supposed - This word implies expectation but again does not strongly indicate obligation.
4. must - This word denotes a strong necessity or obligation to do something.

Conclusion:

The most appropriate word to use in the blank is "must."

Therefore, the completed sentence reads: "You must study hard if you want to pass your exams." This conveys a clear message that diligent study is essential for success in examinations.