Question

which article used before exercise ​

Answer 1

Answer:

An exercise is the correct way..

Answer 2

Answer:

English has three articles: A, AN, and THE. These articles are used before nouns to show whether the nouns are general or specific.

...

Articles A An The Exercises.

EXERCISE TOPICS COVERED

Articles Exercise 5 A vs. An vs. No Article (Use 8)

Articles Exercise 6 A vs. An vs. No Article (Uses 1 - 8)