Questions 18-21 are based on a conversation you are going to hear.With whom is the man speaking

A．How to select a good umbrella.
B．How to treat minor aches and pains.
C．How to sharpen the senses.
D．How to predict the weather.

A．In a department store.
B．At a museum.
C．In a factory.
D．At a warehous

A．Borrow the typewriter.
B．Visit the woman.
C．Go home soon.
D．Read the woman’s paper.