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?

Before the bell rang

Explanation:

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

explanation:

shower, toothbrush, toasters, refrigerators,   and the lights

you use the lights to see and brighten a room. and with out them you cant see. you need a toothbrush to clean your teeth with out it stinky breath. shower to wash ya self and without it you stink. toaster to toast stuff without it nothing is toasted. and the refrigerator to keep stuff cold without it everything goes bad