In the sentence 'Teachers spend a large part of ___ working day preparing lessons.', which possessive determiner completes it?

• A. their
• B. his
• C. our
• D. my

Answer: (A)

Choosing the possessive determiner that shows ownership of the working day. The sentence describes teachers as a group, so the owner of the working day is plural. Their working day is a natural, standard phrase meaning the part of the day that belongs to the teachers as a group. The other options don’t fit because his would imply a single male owner, our would suggest the speaker is part of the group, and my would refer to the speaker alone.