Questions 11 to 18 are based on the conversation you have just heard.

A．Ants tap plant insects till a drop of honey comes out.
B．Ants take care of plant insects.
C．Ants get their food from plant.
D．Ants get honey from bees.

A．Human and wildlife health risks are being reduced.
B．The ecological system will be restored in the near future.
C．Significant near -term improvement in water quality has been made.
D．Pollution enters and moves through the Great Lakes region.