阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。

The world of underwater slumber is unlike what we see on the surface. For mammals (哺乳动物), a good night's sleep sends an animal into a state of unconsciousness (无知觉) during hours of restorative sleeping that helps heal the body and solidify memories firmly in the mind. For fish, however, sleep isn't such a well-defined process. Instead, many fish species have taken to spending short periods in a state of reduced activity or rest while keeping their eyes open to scan the water for potential threats. During these periods of reduced activity, a fish's bodily functions slow down and its watchfulness drops. 

The breadth of animals in the ocean that exhibit this type of reduced activity is wide-reaching. Among the hundreds of thousands of creatures in the sea, some merely ride along with the current, such as jellyfish. Others find rocky bedrooms for the night, while those such as stingrays bury themselves in the sand to rest. However, it must be really hard to get a good night's sleep when you breathe air but live in water. This is something that the world's underwater mammals have to deal with. 

To prevent themselves from drowning (溺死) in their sleep, underwater mammals such as dolphins and manatees have developed the ability to "turn off" one side of their brain to rest, known as unihemispheric sleep. While one side is fast asleep, the other keeps all the animal's vital functions running, such as breathing. Manatees, for example, love to sleep, spending up to 12 hours a day in a deep slumber. However, as air-breathing animals, manatees need to surface every 20 minutes or so for oxygen. To achieve this, the half of the brain that's still awake sends the sleeping manatee to the surface to get some air.

1. （1） What does the underlined word "slumber" in paragraph 1 mean?

   A . Rest. B . Sleep. C . Danger. D . Activity.
3. （2） Why is it hard to define sleep for fish?

   A . Because fish remain partially awake. B . Because fish need short resting time. C . Because fish possess no consciousness. D . Because fish pretend not to be sleeping.
5. （3） What is a challenge faced by underwater mammals?

   A . Hiding in sand. B . Riding the current. C . Finding spots to rest. D . Breathing while sleeping.
7. （4） How do manatees ensure their oxygen supply during sleep?

   A . By sleeping less. B . By adapting to the sea. C . By surfacing periodically. D . By controlling their breath.

Who might the speakers be?

So, after the man's car hit yours, you hit your head on the wheel?<br />That's right. It's all there in the police report. Do you think we have a good case?<br />Yes, but it depends on who had a green light.

Why does the man make the call?

Hi Mary, I'm on the train for a business trip. I won't be able to meet you in town this afternoon.<br />I'm afraid I have to work late. Really sorry.<br />That's okay Mike. Let's arrange something for next week.

What are the speakers going to do?

Shall we go out for lunch now?<br />Yes, but I don't want to eat another sandwich.<br />Me neither. I feel like eating noodles.<br />Okay, I was thinking of pizza though.

What are the speakers talking about?

Look at this one, Anna. There's your English teacher in it.<br />Oh yes, what a nice suit he's wearing.<br />The man in the black shirt beside him is the maths teacher at my school. He's wearing a pair of glasses.

Where are the speakers?

We should go to the departure gate now. What are you looking for?<br />Hang on, I think I've lost.<br />What? Your bag is in your hand.<br />No, it's not that. Oh, silly me. I checked it in.

 听材料，回答问题。

Then the sharing economy is really convenient for me.<br />Oh really?<br />Yes, I guess I can't live without it.<br />I ride a shared bike to work every day, and when my mobile phone is dead, I'd like to<br />use the shared charger.<br />Sometimes when it rains while I don't have an umbrella, I would rent a shared umbrella.<br />Speaking of that, I remember that last weekend I was outside when it rained hard suddenly.<br />So I used a shared umbrella.<br />I held the umbrella for only ten minutes, and then it was broken.<br />I didn't know what happened.<br />Oh you poor thing.<br />Maybe you didn't do it in the right way.<br />Let me teach you.<br />The sharing economy is really convenient for me.<br />Oh really?<br />Yes, I guess I can't live without it.<br />I ride a shared bike to work every day, and when my mobile phone is dead, I'd like to<br />use the shared charger.<br />Sometimes when it rains while I don't have an umbrella, I would rent a shared umbrella.<br />Speaking of that, I remember that last weekend I was outside when it rained hard suddenly.<br />So I used a shared umbrella.<br />I held the umbrella for only ten minutes, and then it was broken.<br />I didn't know what happened.<br />Oh you poor thing.<br />Maybe you didn't do it in the right way.<br />Let me teach you.

1. （1） What did the man use last weekend?

   A . A shared bike. B . A shared charger. C . A shared umbrella.
3. （2） What is the woman going to talk about next?

   A . The proper ways to use the sharing product. B . Her attitude towards the sharing economy. C . The advantages of the sharing economy.

 听材料，回答问题。

I need to take a few hours off to see my doctor.<br />Can you cover for me till I get back?<br />No problem. Do you feel okay?<br />I'm fine. It's just that I have to get my annual physical examination done.<br />If I don't have the report returned in by the end of the week,<br />I may be disqualified from participating in the company's health insurance plan.<br />Oh, by all means go. You need to get that done.<br />I had mine done last month and I've already handed in the paperwork to the Human Resources Department.<br />I need to take a few hours off to see my doctor.<br />Can you cover for me till I get back?<br />No problem. Do you feel okay?<br />I'm fine. It's just that I have to get my annual physical examination done.<br />If I don't have the report returned in by the end of the week,<br />I may be disqualified from participating in the company's health insurance plan.<br />Oh, by all means go. You need to get that done.<br />I had mine done last month and I've already handed in the paperwork to the Human Resources Department.

1. （1） What does the woman want the man to do?

   A . Help with her work. B . Send for a doctor. C . Have a checkup.
3. （2） What is the relationship between the speakers?

   A . Doctor and patient. B . Colleagues. C . Boss and secretary.

 听材料，回答问题。

Good afternoon, Miss. I would like to buy a one-way ticket to Brussels, please.<br />Well, sir, we have an express train that leaves at 9am. Would you like to take it?<br />Of course. A first-class seat, please.<br />Sorry. Currently, we only have business-class seats and second-class seats available. Which would you prefer?<br />Er, I'll go for the business-class seat.<br />By the way, do you serve food on the train?<br />Yes. There is a dining car serving meals and snacks at all times. You can go there to choose the food you like.<br />We do provide free water and coffee for all of our passengers.<br />That sounds great. I'll take it. Can I pay for it with my credit card?<br />Sure. You can choose any way you like to pay for your ticket.<br />Great. Here is my credit card.<br />Okay. Please wait for a moment. Well, here you are, sir. Your train leaves from platform 9 at 9am.<br />Remember to be here at least 30 minutes before you're scheduled to departure time, or you will miss your train.<br />I see. Thank you very much.<br />Have a great trip.<br />Good afternoon, miss. I would like to buy a one-way ticket to Brussels, please.<br />Well, sir, we have an express train that leaves at 9am. Would you like to take it?<br />Of course. A first-class seat, please.<br />Sorry. Currently, we only have business-class seats and second-class seats available. Which would you prefer?<br />Er, I'll go for the business-class seat. By the way, do you serve food on the train?<br />Yes. There is a dining car serving meals and snacks at all times. You can go there to choose the food you like.<br />We do provide free water and coffee for all of our passengers.<br />That sounds great. I'll take it. Can I pay for it with my credit card?<br />Sure. You can choose any way you like to pay for your ticket.<br />Great. Here is my credit card.<br />Okay. Please wait for a moment. Well, here you are, sir. Your train leaves from platform 9 at 9am.<br />Remember to be here at least 30 minutes before you're scheduled to depart your time, or you will miss your train.<br />I see. Thank you very much.<br />Have a great trip.

1. （1） What kind of ticket has the man bought?

   A . A first-class one. B . A second-class one. C . A business-class one.
3. （2） What is free on the train?

   A . Meals. B . Snacks. C . Coffee.
5. （3） When should the man reach the train station?

   A . Before 8:30 am. B . At 9:00 am. C . After 9:00 am.

 听材料，回答问题。

Okay, thank you. Now, I'd like to know your feelings about your journey. So what really<br />floated your boat today?<br />Well, the Wi-Fi has improved a lot. It makes it easier for me to work, even if the room<br />isn't big enough.<br />That's the first time today anyone's mentioned that. It's good to get some positive feedback<br />on that.<br />Hmm?<br />And is there anything you weren't satisfied with?<br />Well, normally, the trains run on time and are pretty reliable, but today it was 15 minutes late.<br />Okay, I'll put that down. Now, I'd also like to ask about the facilities at this station.<br />You've probably noticed that. Can you say something?<br />I think the best thing is that they've improved the amount of information about train times<br />that's given to passengers. Before, there was only one board. But now, there is an electronic<br />display panel. Every time I walk to the platform, I can clearly and quickly know when my train<br />will come.<br />That's good. Anything else?<br />Let's see. One thing is that there aren't enough places to sit down, especially on the<br />platforms.<br />Okay, so I'll put seating down. Thanks for your time.<br />Okay, thank you. Now, I'd like to know your feelings about your journey. So what really<br />floated your boat today?<br />Well, the Wi-Fi has improved a lot. It makes it easier for me to work, even if the room<br />isn't big enough.<br />That's the first time today anyone's mentioned that. It's good to get some positive feedback<br />on that.<br />And is there anything you weren't satisfied with?<br />Well, normally, the trains run on time and are pretty reliable, but today it was 15 minutes<br />late.<br />Okay, I'll put that down. Now, I'd also like to ask about the facilities at this station.<br />You've probably noticed that. Can you say something?<br />I think the best thing is that they've improved the amount of information about train times<br />that's given to passengers. Before, there was only one board. But now, there is an electronic<br />display panel. Every time I walk to the platform, I can clearly and quickly know when my train<br />will come.<br />That's good. Anything else?<br />Let's see. One thing is that there aren't enough places to sit down, especially on the<br />platforms.<br />Okay, so I'll put seating down. Thanks for your time.

1. （1） What is the man doing?

   A . Conducting a survey. B . Asking for directions. C . Planning a trip.
3. （2） What is the woman happy with about the train?

   A . Its space. B . Its Internet. C . Its speed.
5. （3） What do we know about the train today?

   A . It was too crowded. B . It broke down halfway. C . It ran behind schedule.
7. （4） What improvement impressed the woman?

   A . The information display facilities. B . Bigger boards for train times. C . More seats on the platforms.