What a pity! I _____ in London for three more...

What a pity! I _____ in London for three more days, but something urgent needed to be dealt with back in Beijing.

高三英语单项填空简单题查看答案及解析

What a pity! I _______ in Hainan two more days, but something urgent needed to be dealt with back home.

A. must have stayed                                     B. needn’t have stayed

C. may have stayed                                     D. could have stayed

高三英语单项填空中等难度题查看答案及解析

The young boy has come to himself in hospital now. But he ___ unconscious for three days.

A．has been　　　　 B．was　　　　 C．had been　　　　 D．is

高三英语单项填空简单题查看答案及解析

Some day in the future, you shall       what you have done.

高三英语单项填空简单题查看答案及解析

More and more people take part in marathons these days – over 30,000 people will run the London Marathon this weekend, for instance. But it’s not just the 26 miles and 385 yards that could be a daunting prospect. “I have to admit to being completely frustrated by the blocking and for 18-19 miles was just keeping away from people and being held up,” one participant grumbled after the 2012 London Marathon. “I had to overtake a lot of people and ended up with bruised（淤肿的）forearms from all the elbows,” said another.

How do such crowding problems arise, and could they be reduced? Some researchers believe that we can find the answers through a more familiar system in which jams appear – road traffic flow. Martin Treiber, of the Technical University of Dresden in Germany, has previously developed models for traffic flow. One of the first attempts to model traffic flow was made in the 1950s by James Lighthill and his collaborator Gerard Whitham of Manchester University. They considered the traffic as a kind of liquid flowing down a pipe, and looked at how the flow changes as the fluid gets denser(浓稠). At first the flow rate increases as the density increases, since you simply get more stuff through in the same period of time. But if the density becomes too high, there’s a risk of jams, and the flow rate drops sharply.

Treiber’s model of a marathon uses this same principle that the flow rate first increases and then decreases as the density of runners increases, thanks to an sudden switch from free to crowded flow. He assumes that there is a range of different preferred speeds for different runners, which each maintains throughout the race. With just these factors, Treiber can calculate the flow rate of runners, knowing the “carrying capacity”(承载能力)at each point on the route.

This allows Treiber to figure out how blocking might depend on the race conditions – for example, for different starting procedures. Some marathons start by letting all the runners set off at once (which means those at the back have to wait until those in front have moved forward). Others assign runners to various groups according to ability, and let them start in a series of waves.

Treiber has applied the model to the annual Rennsteig half-marathon in central Germany, which attracts around 6,000 participants. The traditional route had to be changed in 2013, because the police were no longer willing to close a road to ensure that runners could cross safely. It could pass either over a 60m wooden bridge or through a tunnel. Treiber used his model to predict the likely blocking caused in the various options. The model predicted that a mass start would risk an overload of runners if the bridge were to be used. Only by moving the starting point further back from the bridge could the danger be avoided – and even then, if some of the numbers assumed in the model were only slightly inaccurate, there was still a risk of jams at the bridge. On the other hand, no dangerous blocking seemed likely for the tunnel route. The run organizers consulted Treiber’s team, and eventually chose this option.

1.What is the worst thing while running a marathon?

A. The long distance.　　　　　　　　　　　　 B. Too many participants.

C. The dangerous blocking.　　　　　　　　　 D. Serious injuries in forearms.

2.Which of the following statements is true?

A. James Lighthill is the first expert trying to model traffic flow.

B. The denser the flow is, the faster the flow rate becomes.

C. The flow rate increases in the beginning because fewer people passed together.

D. The flow rate increases first and then decreases later when the flow is too denser.

3.What is NOT true about the Rennsteig?

A. It has much less participants than the London Marathon in 2014.

B. It has a shorter distance than the London Marathon.

C. The route was changed because the traditional one is not safe any longer.

D. The participants running this marathon will pass a tunnel because this choice is safer.

4.What’s the main idea of the passage?

A. Make a comparison between marathon and road traffic.

B. Running a marathon is somewhat dangerous if it is not well organized.

C. Introduce a new technology to solve the blocking problem in marathon.

D. Some advice for people who are to run a marathon.

高三英语阅读理解中等难度题查看答案及解析

—I’ve lost in the game again.        —________, you still have more chances.

A. What a pity        B. Don’t lose heart  C. Don’t lose your heart          D. I’m sorry for you

高三英语单项填空中等难度题查看答案及解析

It was a very foggy day in London. The fog was so thick that it was impossible to see more than a foot or so. Buses, cars and taxis were not able to run and were standing by the side of the road. People were trying to find their way about on foot but were losing their way in the fog. Mr. Smith had a very important meeting at the House of Commons and had to get there but no one could take him. He tried to walk there but found he was quite lost. Suddenly he bumped into a stranger. The stranger asked if he could help him. Mr. Smith said he wanted to get to the Houses of Parliament. The stranger told him he would take him there. Mr. Smith thanked him and they started to walk there. The fog was getting thicker every minute but the stranger had no difficulty in finding the way. He went along one street, turned down another, crossed a square and at last after about half an hour’s walk they arrived at the Houses of Parliament. Mr. Smith couldn’t understand how the stranger found his way. “It is wonderful,” he said. “How do you find the way in the fog?”

“It is no trouble at all to me,” said the stranger, “I am blind.”

1.According to the passage, we can infer that “bump into” means _______.

A. knock off

B. meet by chance

C. strike

D. traffic accident

2.Which of the following statements are NOT true?

A. The stranger has a better sight than Mr. Smith.

B. Heavy fog can cause traffic accidents.

C. It’s easy to get lost in a foggy day.

D. The fog was getting thicker and thicker.

3.Why is it no trouble at all to the stranger to find the way in the fog?

A. Because he is a local inhabitant of London.

B. Because he lives next to the Houses of Parliament.

C. Because he is familiar with the route.

D. Because he finds the way not by sight but by heart.

4.This article mainly tells us that ________.

A. London is a foggy city.

B. Mr. Smith works for the government.

C. A blind stranger led the way for Mr. Smith in a foggy day.

D. Mr. Smith had a very important meeting and lost his way in the fog.

高三英语阅读理解中等难度题查看答案及解析

—What a pity!

—Yes, I ____ his not trying it, but in vain．

高三英语单项填空困难题查看答案及解析

按每小题后的要求转换下面的句子；每空一词。（每小题1分；满分5分）

1.Lucy will leave for London on business in three hours. （对划线部分提问）

________ ________ will Lucy leave for London on business?

2.The fashion show is successful. （改为感叹句）

______ ________ the fashion show is!

3.The teacher has told us how we should improve our speaking skills.（改为简单句）

The teacher has told us how ________ ________our speaking skills.

4.The boys were too tired to walk on. （改为同义句）

The boys were ________ tired ________ they couldn't walk on.

5.r. Brown and his wife have been married for 20 years.（改为同义句）

Mr. Brown and his wife ___________ ___________ 20 years ago.

高三英语其他题中等难度题查看答案及解析

—What a pity that he missed his final shot and ended in a tie!

—Yes, but he didn't lose it ________！ It just wasn't his day.

A．for fun     B．in preparation

C．on purpose　     D．after all

高三英语单项填空中等难度题查看答案及解析