选择知识点

In many________，the new version is not as good as the old one.（　　）

—What do you think of Alice's idea？
—Honestly,I agree with her,though not ______.（　　）

There was a __________ look on his face when he met with the difficult problems.（　　）

Penny jumped out of the way to avoid _________ by the _________ branch.（　　）

In the past 10 years it ______the doctors______the new drug has great significance for the treatment of the disease.（　　）

Whether we need more food depends on how many people will______ at the party this evening.（　　）

As a nature photographer,although I have to ______ I still enjoy working outside in the wild.（　　）

Does drinking alcohol really help us stay healthy？If so,how much should we have each day？Recently a study,co-authored by 512 researchers from 243 institutions,was published in the well-known journal The Lancet.The researchers built a database of more than a thousand alcohol studies and data sources,as well as death and disability records from 195 countries between 1990 and 2016.The goal was to see how alcohol affects the risk of 23 health problems.The number that jumped out,in the end,was zero.Anything more than that was associated with health risks.
"What has been ignored is that no amount of drinking is good for you," said Emmanuela Gakidou,a professor at the University of Washington. "People should no longer think that a drink or two a day is good for you.What's best for you is to not drink at all," she said.The study found that 2.8 million people across the globe died in 2016 of alcohol-related courses.For people aged 15 to 49，alcohol is the leading risk factor for experiencing a negative health outcome.
This is an alarming report for the roughly 2 billion human beings who drink alcohol.The report challenges the controversial assumption that moderate drinking provides a clear health benefit.That idea took hold in the 1990s after news reports on the "French paradox"：The French have relatively low rates of heart disease despite a fatty diet.Some researchers pointed to red wine consumption among the French as potentially protective.
A large number of studies found evidence that people who have a drink or two a day are less likely to have heart disease than people who give up or drink too much.But the new study,while noting the lower risks of heart disease from moderate drinking,found that many other health risks balance out health benefits.Those include the risks of breast cancer,interpersonal violence,self-harm and transportation accidents.



What can we conclude from the study published in The Lancet？ ______

A. No amount of alcohol is safe.
B. A drink or two day is good for us.
C. Alcohol has little to do with health risks.
D. Alcohol will be forbidden in 195 countries.

What is Emmanuela Gakidou's attitude towards drinking alcohol？ ______

A. Supportive.
B. Unfavorable.
C. Admiring.
D. Unconcerned.

What does the "French paradox" suggest？ ______

A. The French consume too much alcohol.
B. Red wine may cause heart diseases.
C. The French need to go on a diet.
D. Alcohol benefits human beings.

According to the last paragraph,who are less likely to suffer from heart disease？ ______

A. Those who have fatty diet.
B. Those who have given up alcohol.
C. Those who drink a little every day.
D. Those who drink as much as they can.

Recycling plastic has always been a stop-start effort,and the wide variety of plastics we produce,the pollution from waste,and other limitations make recycling an economic（经济）problem.It's estimated（估计）only 9% of plastic ever created has been recycled.But with the help of a chemical process,Canadian Miranda Wang and her company BioCellection want to change that.
Stability is one of plastic greatest qualities and downside.There's limited evidence that some plastics can biodegrade（生物降解）but largely photo-plastics degrade in the sun.It's a long process,and the truth is that we can only estimate how long it takes.Wang is looking to break the inaction and BioCellection's task is to make most plastic waste recyclable.
She outlines two current methods.One is to take plastics like water bottles,wash them,cut them,melt and reconstitute them. "That's a very limited process" she says,due to the requirement that plastics be "clean".The other,which can handle dirtier plastics and a level of pollution,is called hydrolysis（热解）.Intense heat is applied to break down plastics so they can be reused as oils for energy,but "it's not economical," she says.
BioCellection's solution builds on research from over ten years ago,Wang explains,when a US study discovered pure polyethylene powder（聚乙烯粉）could be broken down by a catalyst（催化剂）.Wang and her co-founder Jean hit upon a bacterium being able to eat plastic.In the years since,they engineered a comparable catalyst capable of doing the same job,only faster,which even works on plastics no one else can recycle at present. "We have now found a catalyst that is much cheaper than the one that was used before," Wang says.
Currently focusing on plastic films like shopping hags,the three-hour process breaks clown plastic into chemicals that can act as the building blocks for more complex plastic products.
"Right now we're able to achieve about 70% transformation from plastic waste material to these chemicals," she adds,saying they're working to increase that figure.



Why has so little plastic been recycled？ ______

A. Plastic is chemically stable.
B. Recycling plastic led to pollution.
C. We produced various plastics.
D. Most photo-plastics degrade in the sun.

What does Wang think of the two current methods？ ______

A. Highly effective and dynamic.
B. Expensive and pollution-causing.
C. Limited and energy-consuming.
D. Widely used and recognized.

What did BioCellection find effective to recycle plastics？ ______

A. Polyethylene powder.
B. Chemical products.
C. Plastic films.
D. A catalyst.

What is the text mainly about？ ______

A. Miranda Wang and her company.
B. A new plastic recycling method.
C. The greatest downside of plastic.
D. Transformation of plastic waste.

Have you ever heard someone say,"breakfast is the most important meal of the day"，or give you advice about why it's vital to start the day with a healthy breakfast？It seems that this meal,for many of us,is necessary for our day to start well,but is it really that important？
The word "breakfast" comes from "breaking the fast"— the idea of ending the period in which we don't eat during the night.The regeneration process that takes place while we sleep consumes some of our natural food reserves.Breakfast gives us an opportunity to replenish those reduced stores of things like protein and calcium.So,in that way,a healthy breakfast makes sense.
There are also many often-quoted studies which seem to connect a state of being overweight with not eating breakfast.In fact,it leads many health experts to advise a healthy breakfast to not only control but also lose weight.In a US study,50，000 people were monitored over seven years,and those who ate a healthy breakfast were found to have a lower BMI（体重指数），which seems to suggest that breakfast may indeed help people maintain a healthy weight.
But it might not be as simple as that.Alexandra Johnstone,professor of appetite research at the University of Aberdeen,suggests those who do not have breakfast might be less aware of healthy diets and nutrition,and people who eat breakfast might have a healthier lifestyle overall exercising and not smoking,for example.And he also points out that with the rise in popularity of intermittent（间歇性的）fasting to lose weight,there may also be some benefits to not eating breakfast,like improving blood sugar control and lowering blood pressure.
So while breakfast has its benefits,it might not be the most important meal.It seems that a healthy lifestyle with a balanced diet might be more important for many of us than just one single meal.



Why does the author list the questions in the first paragraph？ ______

A. To give a warming.
B. To offer some advice.
C. To introduce the topic.
D. To prove a certain fact.

What does the underlined word "replenish" mean in paragraph 2？ ______

A. Set aside.
B. Manage without.
C. Make up for.
D. Run out of.

What conclusion can we draw from Johnstone's research？ ______

A. Skipping breakfast may do good to our health.
B. Those who eat breakfast can keep a lower BMI.
C. Breakfast is the most important meal of the day.
D. Intermittent fasting contributes greatly to weight loss.

What does the author suggest we do at the end of the text？ ______

A. Try new lifestyles.
B. Follow a balanced diet.
C. Pay more attention to breakfast.
D. Be aware of the benefits of each meal.