As civilization______, more and more people have realized the importance of preserving rare animals from extinction.
The small window in the wall could ______ some light into the room.
As we know, _______ medical examination will help us find out health problems as early as possible.
Some exercises appear to be ______ ones you have done, but on ______ second thoughts, you’ll find that they’re different.
—Thank you for having bought me a ticket for the World Expo in Shanghai! — ________.
It doesn’t seem ugly to me,________,I think it’s rather beautiful.