______ more attention , the trees could have ...

more attention, the tree could have grown better.

高二英语单项填空简单题查看答案及解析

____ more attention, the trees could have grown better.

A. Given　　　　 B. To give

C. Giving　 　　 D. Having given

高二英语单项填空中等难度题查看答案及解析

____ more attention, the trees could have grown better.

A. Given　　　　 B. To give　　　 C. Giving　　　　　　 D. Having given

高二英语单项填空中等难度题查看答案及解析

______ more attention , the trees could have grown better .

高二英语单项填空中等难度题查看答案及解析

---It’s a pity that the trees are going to die.

---_____ more attention, they could have grown better.

A. Giving    B. Given     C. To give      D. Give

高二英语单项填空中等难度题查看答案及解析

Once ________ more attention, the little trees could have grown better.

高二英语单项填空简单题查看答案及解析

In the past decade, the use of social media has grown in a way that no one could have guessed. It has turned some teenagers into celebrities (名人) and turned the famous into the infamous, overnight.

A key feature of social media, however, is its volatility. Trends come and go, disappearing almost as quickly as they appeared. So, what were the key social media trends of 2018?

Short video apps such as TikTok and its Chinese equivalent Douyin, took the world by storm. The Telegraph reported that TikTok was ranked 8th on Apple’s App Store in April. And Douyin had more than 300 million domestic monthly active users in June, CNBC said.

Why are these short videos – which are rarely longer than a few minutes – so popular? Jiang Yige, Singapore-based analyst at FengHe Fund Management, has a theory. Short videos are “just right to fill in the little gaps in our busy schedules,” he told CNBC.

These videos – apart from being very convenient – are important to teenagers because they allow them to express themselves, according to Teen Vogue.

The sense of community that users of short video app get is another appealing feature. Liza Koshy, a user of the US app Musically who has over 2 million followers, said that she was thrilled when anyone said that her video had “inspired” them. “It’s really cool … because I think as social creators that’s what we all are,” she added.

Live streaming is another feature of our social media life that now seems as natural as sunrise. It’s a pretty neat idea: You can watch anyone, anywhere, live.

However, China has taken live streaming to a whole new level. In China, more than 100 million viewers monthly watch a live streaming video. Forbes thought that a number of factors had led to the popularity of live streams. Among them is viewers’ ability to interact while remaining anonymous.

However, the boom in social media may be having side effects too. Fake news is one serious problem it arguably causes. Material shared on these platforms is often not checked for accuracy. The most basic content can be false and can sway users one way or another. We use social media all the time; that doesn’t mean that we understand the influence it is having on us. We should be mindful of both the time we spend on it and its impact on our minds.

1.The underlined word “volatility” in Paragraph 2 possibly means “being _____”.

A.changeable B.steady

C.promising D.violent

2.According to Lisa Koshy, short videos are very popular because _____________.

A.they are very convenient

B.they help people kill time

C.they provide a sense of community

D.they allow people to express themselves

3.What can we learn about social media from the text?

A.The information from social media is highly reliable.

B.When it comes to social media, people know short videos the best.

C.People can’t communicate with each other without social media.

D.There is still much room for social media to make improvement.

4.What is the best title for the text?

A.Rapid Development of Social Media

B.Key Social Media Trends ruling 2018

C.Short Videos Taking the World by Storm

D.Live Streaming—New Feature of Social Media

高二英语阅读理解中等难度题查看答案及解析

British scientists have discovered the willow trees planted at an angle could increase sugars for biofuel production.

Willow is a fast-growing species. It is already used to produce fuels for the renewable heating and power market. In future it could also help to produce biofuel to power vehicles. It has been known that when willows growing in the wild are blown sideways, they tend to produce more sugars. But for a while it has not been known why this happens.

Researchers at Imperial College London, led by Dr Nicholas Brereton and Dr Michael Ray of the Department of Life Sciences, have now solved the mystery. When the tree is blown sideways, its genes (基因) produce large numbers of sugar molecules (分子) to straighten the tree upwards.

“This is an important breakthrough. Our study now shows that natural genetic changes are related to these differences. And this could well be the key to unlocking the future for green energy from willow,” said Dr Brereton.

The research was carried out under lab conditions. The willows were grown at an angle of 45 degrees. They were compared to willows which grow naturally straight upwards. The team then looked for the same effect among the willows growing on the Isle of Orkney where strong winds cause the trees to bend at extreme angles. They discovered that the Orkney trees produce five times the amount of sugars found in willows grown in sheltered conditions.

Willow is widely planted across the UK. The results show that biofuel crops such as willows could be grown in climatically changeable conditions where chances of growing food crops are limited.

The study is published in Biotechnology for Biofuels.

1.What may happen when willows are planted in strong winds?

A. They stop growing.　　 B. Few sugars are produced.

C. They try to grow sideways.　　 D. Changes in genes take place.

2.The Orkney willows ________.

A. are unusually rich in sugars　　 B. grow naturally straight upward

C. look taller than ordinary willows　　 D. are stronger than those growing in labs

3.Farmers living in changeable climate _______.

A. use biofuel for heating and power　　 B. are encouraged to grow biofuel crops

C. can plant different kinds of food crops　　 D. should make their willows grow straight

4.Where does this passage most probably come from?

A. A personal diary.　　 B. A travel magazine.

C. A scientific journal.　　 D. A newspaper advertisement.

高二英语阅读理解困难题查看答案及解析

If the weather had been better, we could have gone outing. But it ____ all day.

A．rains             B．has rained         C．had been rained    D．rained

高二英语单项填空中等难度题查看答案及解析

If the weather had been better, we could have gone outing. But it ____ all day.

A．rains             B．has rained         C．had been rained    D．rained

高二英语单项填空中等难度题查看答案及解析