--Did you see a girl in red pass by just now?
--No, sir. I _______________a newspaper.

—Did you see a girl in red pass by just now?
—No, sir. I _____ a newspaper.

—Did you see a girl in red pass by just now?

—No, sir. I _____ a newspaper.

A．read             B．am reading        C．would read        D．was reading

--Did you see a girl in red pass by just now?

--No, sir. I _______________a newspaper.

A．have read         B．was reading        C．would read        D．am reading