Sentence with diligent?

I was determined to work hard for A's, and was always a diligent student at school.

He's really diligent with his work and gets it done on time.

The diligent student does his own homework and does not rely on answers from the Internet.

"he was very diligent while he worked on his project" "he worked diligently on his paper"

My friend was very diligent in completing her homework. Astronomers must be diligent in recording their observations.