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

A．Some of them died out because they couldn't adapt to their environment.
B．They could reproduce in a large number to keep the species survive.
C．They developed the ability to change their surroundings.
D．They must abide by their traditional behavior to survive.

A．She did some acting work for TV shows．
B．She sang for a local music group．
C．She produced her first music album.
D．She joined an all-America music tour.