Questions 19 to 21 are based on the conversation you have just heard.

A．What chemicals tears are composed of.
B．Whether crying really helps us feel better.
C．Why some people tend to cry more often than others.
D．How tears help people cope with emotional problems.

A．The epidemic has been brought under control.
B．There are signs of progress in the peace process.
C．Great improvements are being made in its capital.
D．There’s little hope of bringing the conflict to an end.