听下面一段较长对话，回答以下小题。
【小题1】Why is the man going to the States?

A．To visit some places of interest.

B．To visit his close friends.

C．To attend a conference.

【小题2】When does the man leave for California?

A．In January.

B．In February.

C．In March.

【小题3】What is possibly the man?

A．A doctor.

B．A singer.

C．A scientist.