听下面一段独白，回答以下小题。
【小题1】What do we know about Sydney?

A．It has the world’s biggest deep water harbor.

B．It has a population of less than three million.

C．It’s a place of natural beauty with green parkland.

【小题2】Which area dates back to the early nineteenth century?

A．Houses in Paddington.

B．Lady Macquarie’s Chair.

C．The Koala Bear Park.

【小题3】What makes the Opera House outstanding?

A．Its modern design.

B．Its unbelievable size.

C．Its history.

【小题4】What is the average summer temperature in Sydney?

A．About 30℃.

B．About 20℃.

C．About 10℃.