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

A．Diet has nothing to do with health.
B．The amount of food has something to do with health.
C．Health depends on diet totally.
D．Good food has nothing to do with health.

A．She wants the man to listen to the instructions and observe.
B．She wants the man to watch while she performs the operations.
C．She wants the man to ask questions so that she can help him.
D．She wants the man to try to do it while she gives him instructions.