When I stepped into the classroom, I saw the teacher _____ out the test papers.

Can I smoke here? —No．On no condition ______ in the museum．

The man over there teaches geography.

I went to the Window of the World in Shenzhen. It’s ____ great ______to see a lot of beautiful views in one day.

Lin Shuhao put all his effort _____ basketball training and _____ great progress at last.