For the past month, the team ____ (monitor) the network for unusual activity. 

Right now, the system ____ (process) a large data request. 

By the time the technician arrived, we ____ (already/check) all possible solutions. 

Before automation, engineers ____ (spend) hours configuring each database entry. 

The IT manager ____ (know) the best practices for data encryption. 

Offices ___(use) have isolated computer systems before networks connected all the devices for easier data sharing. 

Recently, I ____ (learn) how to secure our data storage effectively.

Since the beginning of this year, the team ____ (work) on improving our database security. 

She ____ (analyze) data all day yesterday to prepare for the meeting. 

Last month, our network ____ (crash) due to an unexpected server error.