听下面一段较长对话，回答以下小题。
【小题1】Where did Mark learn about the Dead Sea?

A．From a book.               B .From his parents.               C. From a TV programme.

【小题2】Why does the woman ask Mark about the Dead Sea?

A．To finish her paper.

B．To know if it’s worth a visit.

C．To make sure it is a safe place.

【小题3】What makes Komodo Island famous?

A．Its large size.

B．The special custom.

C．The home of a special animal.

【小题4】What is the most probable relationship between the speakers?

A．Friends.

B．Family members.

C．Co-workers.