【推荐1】听下面一段较长对话，回答以下小题。
1. What does the man say about hot deserts?

A．They are hot all the time.

B．They are dangerous to live in.

C．The temperature is changeable.

2. What do deserts have in common?

A．They’re dry.

B．They re sandy.

C．They’re large.

3. What do we know about the desert animals?

A．Many of them live in groups.

B．Many of them live at the edges of deserts.

C．Many of them sleep in the day and come out at night.

【推荐2】听下面一段独白，回答以下小题。1.

A．What causes fearfulness externally.

B．Why mice are particularly fearful animals.

C．Whether fearfulness is inherited or not.

D．How animals react to frightening situations.

2.

A．They wandered around the box.

B．They bred again and again.

C．They couldn’t find a hiding place.

D．They remained close to one wall.

3.

A．Some changes in the nervous system.

B．The interference from human beings.

C．The size of nerve cells in the brain.

D．The existence of certain nerve cells.

【推荐3】听下面一段独白，回答以下小题。
1. Why haven’t people found treatments for the flu?

A．It’s too expensive to develop medicines.

B．There are too many kinds of viruses.

C．They are unwilling to put much into medicines.

2. What is one symptom of the flu according to the speaker?

A．A runny nose.

B．Low temperature.

C．High blood pressure.

3. What do some scientists say about taking medicines?

A．It causes damage to our organs.

B．It does harm to people’s health.

C．It helps us to recover quickly.