Definite article(the) or no article Form and use
We use the definite article(the):
-with something or someone you mentioned before.Have they done a survey? Yes, They finished the survey last week.
-when it is part of the name of something. The usA introduced car pool lanes.
-with superlative phrases. Consumers spend the most money on electronic equipment. We use no article:
-with most countries. He lives in Canada and I live in Spain.
-to talk about people and things in a general way. People are trying to recycle more rubbish
-with certain expressions. work at night.