1. Listen! I think someone is knocking at the door. 

Up to the present, we have been writing almost every lesson in the book. 

The earth circles the sun once every 365 days.

. The farmers are working in the field at the moment. 

 How many times have you seen him since he went to Edinburgh?

1. Up to the present, we have been writing almost every lesson in the book. 
2. The earth circles the sun once every 365 days.
3. The farmers are working in the field at the moment. 
4. How many times have you seen him since he went to Edinburgh?
5. Rivers usually flow to the sea.