Answer:
Select the incorrect definite and indefinite articles in the sentences below. 
As soon as I finished my apprenticeship, I bought myself a van and went into business as a plumber. 
Choosing the right course can be difficult. There are so many courses out there. I was lucky, because the course I chose had an excellent teacher. 
My supervisor said that I was allowed to take an hour's break after the lorries had been filled in the loading bay. 
Step-by-step explanation:
Select the incorrect definite and indefinite articles in the sentences below. 
Incorrect articles in bold.
As soon as I finished my apprenticeship, I bought myself an van and went into business as a plumber. 
Choosing the right course can be difficult. There are so many courses out there. I was lucky, because the course I chose had the excellent teacher. 
My supervisor said that I was allowed to take a hour's break after the lorries had been filled in the loading bay.