Question

Before the bell rang, all the students were required to neaten up the areas around their desks.

Which is the adverb clause from this sentence?

Answer 1

Before the bell rang

Step-by-step explanation:

Answer 2

Before the bell rang

Step-by-step explanation:

Because it describes when the students are required to neaten up the area around their desks. Adverb clauses tell when something occurs.