Question

Fill in the blank with the most appropriate option.
He ________ today.

• A. are working
• B. is working
• C. work
• D. working

Answer 1

The correct option is B is working

Here, 'is working' in Present Continuous Tense is correct because it implies an action going on at the time of speaking.
Here, he 'is working' (an action going on at the time of speaking).
'Are working' is incorrect because the subject (he) is singular. And with singular subjects, singular verb (is) is used.
'Work' in present simple is incorrect because it is used to indicate a future event on a designated date as part of a plan.
'Working' is grammatically incorrect.