Correct answer is:
"Vosotros fuisteis al restaurant sin Angela."
Step-by-step explanation:
In English or Spanish grammar, a conjunction is a part of speech that joins terms, expressions, or sentences that are called the conjuncts of the conjoining structure. The term conversation label is frequently practiced for conjunctions connecting sentences. Therefore, in the given sentence, the word fuisteis is conjunction that best fits in the situation to complete the sentence.