when
than
then
before
Answer is Wrong!
Answer is Right!
The correct answer is: B. than
The word “than” is used to introduce a clause that describes a consequence or result. In this case, the consequence of the teacher entering the class is that all the students stood up.
The other options are incorrect because they do not make sense in the context of the sentence.
- “When” is used to introduce a clause that describes a time. In this case, it would not make sense to say “When sir entered the class, all the students stood up.” This is because the students stood up after the teacher entered the class.
- “Then” is used to introduce a clause that describes a sequence of events. In this case, it would not make sense to say “Then sir entered the class, all the students stood up.” This is because the teacher entered the class before the students stood up.
- “Before” is used to introduce a clause that describes a time that happened earlier than another time. In this case, it would not make sense to say “Before sir entered the class, all the students stood up.” This is because the students stood up after the teacher entered the class.