轻松寒假，快乐复习30天 第28天

________of the people on the Net ________China's economy is among the strongest in the world.

________of the land in that district________covered with trees and grass.

One third of the country________covered with trees and the majority of the citizens________black people.

As a result of the destruction of the forest, a large ________ of animals ________ lost their living places.

How close parents are to their children ________ a strong influence on the development of the children's characters.

The famous musician, as well as his students, ________ to perform at the opening ceremony of the 2012 Taipei Flower Expo.

He is the only one of the students who __________a winner of scholarship for three years.

She told me that she had mailed part of the products and that the rest ______ in a few days.

The father along with his children ______ solving word puzzles.

The teacher as well as the students who_____fond of football,_____ playing together.

The family had just moved．The young woman was feeling a little       ．It was Mother's Day—and 800 miles separated her from her parents．
She had called them that morning，and her mother had       how colorful their backyard was       spring had arrived． Later，she told her husband how she      those lilacs(丁香)in her parents’yard．“I know where we can find some，”he said．“Get the       and come on．”So off they went．
Some time later，they stopped at a hill and there were lilacs all round．The young woman rushed up to the nearest       and buried her face in the flowers．Carefully，she      some．Finally，they returned to their car for the      home．The woman sat smiling，surrounded by her       ．
When they were near home，she shouted“stop”，got off quickly and       to a nearby nursing home．She went to the end of the porch(门廊)，where a(n)     patient was sitting in her wheelchair，and put the flowers into her lap．The two       ，bursting into laughter now and then．Later the young woman turned and ran back to her      ．As the car pulled away，the woman in the wheelchair       with a smile，and held the lilacs       ．
“Mom，”the kids asked，“       did you give her our flowers?”“It is Mother's Day，and she seems so       while I have all of you．And anyone would be       by flowers．”
This satisfied the kids，but not the husband．The next day he       some young lilacs around their yard．
I was the husband．Now，every May，our yard is full of lilacs．Every Mother’s Day our kids       purple lilacs．And every year I remember that smile of the lonely old woman．

A．moved B．worried C．angry D．depressed

A．1earned B．imagined C．mentioned D．realized

A．now that B．so that C．as if D．even if

A．missed B．grew C．watered D．showed

A．cars B．kids C．clothes D．1ilacs．

A．bush B．hill C．yard D．door

A．bought B．picked C．set D．raised

A．break B．holiday C．trip D．dinner

A．friends B．memory C．flowers D．honor

A．responded B．pointed C．drove D．hurried

A．1oving B．elderly C．serious D．sensitive

A．hesitated B．waited C．sat D．chatted

A．family B．mother C．path D．home

A．nodded B．waved C．1eft D．continued

A．sadly B．politely C．quickly D．tightly

A．why B．when C．how D．where

A．quiet B．confused C．alone D．patient

A．calmed B．persuaded C．disappointed D．cheered

A．arranged B．dried C．planted D．hid

A．find B．gather C．receive D．buy

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.
What is the worst thing while running a marathon?

Which of the following statements is true?

What is NOT true about the Rennsteig?

What’s the main idea of the passage?

目前，青少年追星成为一个非常普遍的现象。有些青少年对偶像崇拜(celebrity worship)近乎痴迷。请你就青少年追星这一话题写一篇英语短文。要点包括:
1. 你如何看待青少年追星这一现象;
2. 青少年追星对其自身有何影响。
注意:
可适当增加细节，以使内容完整充实。
词数： 120 左右。
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One third of the country ________ covered with trees and the majority of the citizens________black people.