A．A clever clog knows everything in the world.
B．All the living creatures have the same ancestor.
C．Species can change into other species through natural selection.
D．Ideas are transformative and can be united.

A．Some of them died out because they couldn't adapt to their environment.
B．They reproduced in large numbers to keep the species survive.
C．Some of them developed the ability to change their surroundings.
D．They all evolved into other species.

A．She performed acting roles for TV shows.
B．She sang for a local music group.
C．She released her first music album.
D．She joined a music tour of America.