---What does Tom’s uncle do? ---He is a teacher. He __________ physics at a school now.
_________ people were found __________ after that earthquake.
It is easy to ________the differences between them because they have little ____.
We are covering these __________ girls’ wonderful performances _______.
We all know that learning a skill _________ time and effort.
Man’s understanding of nature is developing ________. It never stays at the same level.