34.

Answer and Explanation

Your Answer is

Correct Answer is H

Explanation

However "however", as the case maybe "depends on the situation", in fact "in fact", regardless of time "regardless of time", the previous sentence means "the air outside is very cold, and the students inside are alive and well, ignoring the classroom ", the last sentence means "they, in fact, are very disturbing" This sentence is to explain the situation of a fact, so use in fact.