You look so tired. You______have stayed up late again.
. The Roman Empire _____ for several centuries. A exists B. existed C. was existed D. is existing
. I could hardly tell the twins apart because their appearances are only ____ different.
He is the lawyer who you took photos ____ you were in the Forbidden City.
This picture was taken when my father was a child and even I myself couldn’t _____.
While ____ in tea with that dealer, Mr. Smith had himself ____.