1 . 听下面一段独白，回答以下小题。
1. What will control the tree house’s temperature?

A．The roof.

B．The leaves.

C．The soil.

2. What is the most important design of a lizard house?

A．Changing colors.

B．Collecting sunlight.

C．Producing energy.

3. Why can the chimney be a useful air conditioner?

A．It allows cool air to come in.

B．It is easy for hot air to flow out.

C．It can protect the house from strong cold air.