Question

Fill in the blanks with the most appropriate words.
She was ___ duty and had to stay ___ the classroom ___ classes.

• A. after/at/at
• B. on/in/after
• C. on/at/at
• D. in/in/in
• E. on/with/at

Answer 1

Answer: (B)

on/in/after

Option "B" is the correct answer.

EXPLANATION:

A preposition is a word used to link nouns, pronouns , or phrases to other words within a sentence.

In the first blank, preposition "on" will be used because preposition "on" is used to indicate the state of something or someone ( on duty ).

In the second blank, preposition "in" will be used because preposition "in" is used to indicate an enclosed location or place ( the classroom)

In the third blank, preposition "after" will be used because "after" is used to indicate something "later than" ( after classes).