Correct the articles if wrongly used. 1. A cow is an useful animal as it gives us the milk.

2. 1 shall shift to the London in an year.

3. Ali is the thin boy but Parth is a thinnest boy in class.

4. A pilot announced that we are going to land at an airport in five minutes.

5. A milk is the nutritious food.

6. Walking is an good exercise for the one and all.

7. A earth moves around a sun.

8. A Illiad is one of the best-known epics in a world.​