Fill in the blank with the appropriate tense.
Jobin has been working all day. He ___________ tired.
Show answer & explanation
Correct answer: D
Explanation
Context: The first sentence, "Jobin has been working all day," establishes a current state or a cause (hard work).
Logical Deduction: Based on this evidence, the speaker is making a strong logical assumption about the result. In English grammar, "must" is used to express a high degree of certainty or logical necessity.
Comparison: While "will be" suggests a future state, "must be" best fits the context of a logical conclusion drawn from present evidence.
Completed Sentence: "Jobin has been working all day. He must be tired."