A．People are ignorant of the harm in eating too much chocolate.
B．People love chocolate very much although they hate it at the same time.
C．People know nothing about healthy eating.
D．People pay less attention to their health nowadays.

A．The woman received a phone call from Mark yesterday.
B．The man injured Mark in a traffic accident yesterday.
C．The man met a friend by chance.
D．The woman contacted Mark on business.