Passage Three
Questions 32 to 35 are based on the passage you have just heard.

A．Riding a horse.
B．Shooting a movie.
C．Playing a game.
D．Taking a photo.

A．Planktons are too small to be seen.
B．Most planktons have transparent tissues.
C．Most planktons are practically invisible to predators.
D．Planktons are fascinating organisms.