1 . Are you an early bird or a night owl? Our activity patterns and sleep cycles could influence our risk of heart disease. New research published in Experimental Physiology found wake/sleep cycles cause metabolic (新陈代谢) differences and change our body’s preference for energy sources.

Researchers from Rutgers University, New Jersey, USA classified participants into two groups(early and late) based on their natural tendency to seek activity and sleep at different times. The participants were monitored for a week to assess their activity patterns across the day. They ate a calorie and nutrition-controlled diet and had to fast overnight to minimize dietary impact on the results. To study fuel preference, they were tested while at rest before completing two 15-minute period of exercise: one moderate and one high intensity session on a running machine. Aerobic fitness levels were tested through an incline challenge where the incline was raised 2.5% every two minutes until the participant reached a point of exhaustion.

The researchers found that those who stay up later have a reduced ability to use fat for energy, meaning fats may build up in the body and increase the risk of heart disease. People who are ‘early birds’ rely more on fat as an energy source and are more active during the day with, higher levels of aerobic fitness than ‘night owls’. On the other hand, ‘night owls’ use less fat for energy at rest and during exercise.

Researchers also found that early birds use more fat for energy at both rest and during exercise than night owls. Professor Steven Malin from Rutgers University said, “We found that early birds are more physically active and have higher fitness levels than night owls. Farther research is needed to examine the link between exercise and metabolic adaptation to identify whether exercising earlier in the day has greater health benefits.”

1. What does the underlined word “fast” in paragraph 2 mean?

A．Move quickly.	B．Go without food.
C．Exercise regularly.	D．Fall sound asleep.

2. How was the research conducted?

A．By making a survey.	B．By making contrasts.
C．By providing examples.	D．By introducing a concept.

3. What is the characteristic of the “early birds”?

A．Having lower fitness level.	B．Using less fat during exercise.
C．Consuming more fat at rest.	D．Being more active during the night.

4. What is Malin’s attitude to the result of the research?

A．Tolerant.

B．Pessimistic.

C．Indifferent.

D．Uncertain.

2 . I’d been exploring the 40-hectare woods around our cottage my whole life and I knew the way well. So it was a _________ when I found myself lost there.

One dull cold February afternoon, I had a sudden _________ to hike the hill with my two daughters. Putting on our snowshoes, we immediately _________ northwestward. While making our way up the hill, my daughters stopped occasionally to investigate unknown plants and to look at the abandoned deer beds… These really made their _________.

As the shadows started to _________, we moved further up. Soon, weariness began to _________ enthusiasm. We decided to return. Instead of backtracking over our _________ route, I chose to walk down the steep (陡峭的) side of the hill, _________ my general sense that ahead of us lay the stream that would guide us to the road. But as the terrain (地形) leveled out, I had my first major moment of _________: Where was the stream? Were we off course?

I instinctively (本能地) pulled out my phone to get my location, but it __________ in my hand in the cold air. __________, I started feeling a bit panicky. However, I quickly __________ myself, reassuring my daughters to continue walking. Focusing on the landmarks, I spotted a familiar tree and eventually __________ the road.

That winter’s day taught me a valuable lesson about habitual reliance on technology. If my phone had __________ then, I might have directly followed the GPS, ignoring the old __________ of depending on surroundings and life skills.

1.

A．challenge

B．shock

C．reward

D．reminder

2.

A．discovery

B．response

C．worry

D．urge

3.

A．escaped

B．drove

C．headed

D．looked

4.

A．reputation

B．dream

C．day

D．way

5.

A．lengthen

B．swing

C．emerge

D．fade

6.

A．fuel

B．witness

C．overlook

D．outpace

7.

A．original

B．rough

C．offbeat

D．roundabout

8.

A．appreciating

B．trusting

C．envisioning

D．assessing

9.

A．curiosity

B．comparison

C．doubt

D．anticipation

10.

A．died

B．slipped

C．flashed

D．rang

11.

A．Reportedly

B．Admittedly

C．Seemingly

D．Surprisingly

12.

A．exposed

B．composed

C．defended

D．behaved

13.

A．got off

B．laid down

C．came across

D．made out

14.

A．worked

B．remained

C．changed

D．overheated

15.

A．theory

B．standard

C．practice

D．routine

3 . 听下面一段较长对话，回答以下小题。
1. Why does the woman refuse the man’s request?

A．He lost the receipt.

B．He bought his laptop at a sale.

C．The laptop’s return period is over.

2. How long is the guarantee period?

A．A month.

B．Half a year.

C．A year.

3. How will the man probably contact the factory?

A．Through an agent.

B．By telephone.

C．Over the Internet.

8 . 听下面一段独白，回答以下小题。
1. What is the talk mainly about?

A．A campaign for healthy life.

B．A fundraising event for charities.

C．A volunteer program in the neighborhood.

2. When will Challenge Week come to an end?

A．On Wednesday.

B．On Friday.

C．On Sunday.

3. What is one challenge mentioned by the speaker?

A．Giving up sugar for five days.

B．Speaking 20 words a day for a month.

C．Disconnecting from social media for a week.

4. What should Challenge Week participants do?

A．Donate as much as possible.

B．Find sponsors for their challenges.

C．Complete challenges with others together.