Put in a/an,the or no article.
1. I called... waiter... waiter came in a few minutes.
2. Where is... center of... earth.
3. ... Lake Windermere in... nort-west of... England is one of the largest lakes in... British Isles.
Плизззззз, Хелп.

1. I called a/the waiter. The waiter came in a few minutes.

2. Where is the center of the earth?

3. Lake Windermere in the nort-west of England is one of the largest lakes in the British Isles.