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

A．They have difficulty identifying these cells.
B．They’ve found similar cells in other species.
C．They’ve learned how to reproduce these cells.
D．They aren’t sure how these cells work.

A．They chased the bear away.
B．They climbed up a tree.
C．They stayed outside the tent and did nothing.
D．They put some honey outside for the bear to eat.