The students set up their experiments. They set up quickly.
The science fair began.
whenever although joining words
before
Combine the sentences into one sentence. Use one of the joining woRds

The students set up their experiments quickly before the science fair began.

Explanation:

"Joining words" are used to connect sentences, clauses, phrases, words, etc. together in order to express a clear idea without unnecessary pauses. It also makes the thought direct, clear and concise.

"Before" as a joining word/conjunction is used in the sentence above to show how one event immediately happened after another event. So, the first event refers to the students' setting up their experiments quickly while the second event is the start of the science fair.

"They set up quickly" can be incorporated into one with "The students set up their experiments" because it talks about the same situation–the students' experiments.

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.

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