1 . 听下面一段独白，回答以下小题。
1. When is the healthiest sleeping time?

A．At about 8 p.m.

B．Between 10 p.m. and 11 p.m.

C．After midnight.

2. How many volunteers participated in the research?

A．80,000.

B．18,000.

C．3,000.

3. Who is David Plans?

A．A volunteer.

B．A patient.

C．A sleep expert.

4. What is the speaker mainly talking about?

A．A report about sleeping time.

B．The importance of healthy lifestyle.

C．The link between bedtime and heart health.

2 . 听下面一段长对话，回答小题。
1. Why does the woman have a cold?

A．She went winter swimming.

B．She ate some ice cream.

C．She took a cold shower.

2. What is the woman’s nationality?

A．Russia.

B．Australia.

C．Britain.

3. Why does the woman refuse winter swimming?

A．She is afraid of the icy coldness.

B．She can’t swim.

C．She has high blood pressure.

4. What does the man remind the woman to do?

A．Test her blood pressure.

B．Take some medicine.

C．Go winter swimming with him.