Answer:
1. a connecting word that joins words or groups of words
A. conjunction
2. an adverb used to join main clauses
C. conjunctive adverb
3. a conjunction used to join words, phrases, or clauses of equal rank or significance
B. coordinating conjunction
4 conjunctions that are used in pairs
E. correlative conjunction
5. a conjunction that introduces a subordinate clause
D. subordinating conjunction
Explanation:
1.A
2.C
3.B
4.E
5.D