The correct answer is: A. will
The sentence “If he works hard he will pass” is a simple present conditional sentence. In this type of sentence, the “if” clause is in the simple present tense, and the main clause is in the future tense. The future tense is used to express a prediction or possibility. In this case, the speaker is predicting that if the person works hard, they will pass the test.
The other options are incorrect because they are not in the future tense. Option B, “shall,” is used to express a command or obligation. Option C, “will be,” is used to express a prediction or possibility, but it is in the passive voice. Option D, “shall be,” is used to express a command or obligation, but it is in the passive voice.
Here are some more examples of simple present conditional sentences:
- If you study hard, you will get good grades.
- If you eat your vegetables, you will grow up big and strong.
- If you don’t wear your seatbelt, you will get a ticket.