The strong storm did a lot of damage to the coasta

The strong storm ______ all the power lines in this region.

A．knock over

B．knock out

C．knock at

D．knock up

A.lack of rain

B.heavy storm

C.strong wind

D.heavy snow

A.strong tropical storm

B.strong fast wind which speeds more than 75 mph

C.occurring over the West Pacific Ocean and China Seas

D.Hurricanes are usually given girl's names

bove forecast, the wind in Beaufort Scale will be ______.

A.STRONG GALE TO STORM

B.GALE TO STRONG GALE

C.NEAR GALE TO GALE

D.STRONG BREEZE TO NEAR GALE

‍‍Q: Why did Benjamin Franklin fly a kite in a storm？‍‍

A.To protect houses against lightning.

B.To test the effects of the lightning rod.

C.To find out the strength of silk for kites.

D.To prove that lightning is electricity.

the intelligence test become unpopulr in the pst few decdes Its vlidity ws chllenged by mny communities. B．It ws considered discrimintiveginst minority children. C．It met with strong opposition from the mjority of blck prents. D．It deprived the blck children of their rights to good eduction.

A．Its validity was challenged by many communities．

B．It was considered discriminative against minority children．

C．It met with strong opposition from the majority of black parents．

D．It deprived the black children of their rights to a good education．

No one knows for sure just how old kites are。 In fact， they have been in use for centuries。 25 centuries ago， kites were well-known in China。 These first kites were probably made of wood。 They may even have been covered with silk， because silk were used a lot at that time。 Early kites were built for certain uses。 In ancient China， they will use to carry ropes to cross rivers。 Once across， the ropes were tear down and wooden bridges would hang for them。 Legend tells of one General who flew musical kites over the enemies’ camp。 The enemy fled， believing the sounds to be the warming voices of angels。 By the 15th century， many people flew kites in Europe。 Marco Polo may have brought the kite back from his visit to China。 The kite has been linked to great names and events。 For instance， Benjamin Franklin used kite to prove the lightening electricity。 He flew the kite in the storm。 He did this in order to draw lightening from the clouds。 He tied a metal key and a strip of silk to the kite line。 The silk ribbon would stop the lightening from passing through his body。 Benjamin’s idea was first laughed at。 But later on， it enlightened the invention of the lightening rod。 With such grand history， kite flying is short remain an entertaining and popular sport。

Question 16 to 18 are based on the passage you have just heard。

Question 16： What does the speaker say about kite？

Question 17： What did ancient Chinese use cats to do？

Question 18： Why did BF flied a kite in the storm？

Questions 21 to 25 are based on the following passage:

Some radio singals were heard in 1967.They were coming from a point in the sky where there was unknown star.They were coming very regularly,too:about once a seco nd,if they were controlled by clock.

The scientists who heard the signals did not tell anybody else.They were rather afraid to tell in case they frightened people.The signals were coming from a very small body—no bigger,perhaps than the earth.Was that why no light could be seen from it？Or were the signals coming from a planet that belonged to some other star？There was no end to the questions,but the scientists kept the news secret.“Perhaps there are intelligent beings out there.”they thought,“who are trying to send messages to other planets,or to us？So the news was not given to the newspaper.Instead,the scientists studied the signals and searched for others like them...Well,all that happened in 1967 and 1968.Since then scientists have learnt more about those strange,regular,radio signals.And they have told the story,of course.

The signals do not come from a planet;they come from a new kind of star called a “pulsar””.About a hundred other pulsars have now been found,and most of them are very like the first one.

Pulsars are strong radio stars.They are the smallest but the heaviest stars we know at present.A handful of pulsar would weigh a few thousand tons.Their light—if they give much light—is too small for us to see.But we can be sure of this,no intelligent beings are living on them.

21. The radio signals discussed in this passage____.

A.were regular B.were controlled by a clock

C.were heard in 1967 only D.were secret messages 

22. The radio singals were sent by____.

A.a satellite 

B.a planet

C.a sky body which was unknown at that time

D.intelligent beings who were unknown at that time 

23. The scientists did not tell people about the signals because____.

A.the singals stood for secret messages

B.people would ask them too many questions

C.they did not want to frighten people

D.they stood for unimportant messages

24. A pulsar is____.

A. a small heavy star which sends out strong radio signals and cannot be seen 

B. a small heavy planet which sends out strong radio signals and cannot be seen 

C. a small heavy satellite which sends out strong radio signals and cannot be seen

D. a small intelligent being who sends out strong radio signals and cannot be seen

25. Which of the following is true？

A.One of the pulsars found by scientists sends radio signals.

B.Pulsar began to send radio singals in 1967.

C.Scientists have searched for pulsars for many years but found none.

D.Scientists have found many pulsars since 1967.

the Atlantic. Hurricanes that form. in the Atlantic Ocean are expected to gain considerable strength as the global temperature continues to rise, a new study has found. Using modeling data focused on the conditions in which hurricanes form, a group of international researchers based at Beijing Normal University found that for every 1.8°F (1℃ )rise of the Earths temperature, the number of hurricanes in the Atlantic that are as strong or stronger than Hurricane Katrina will increase twofold to sevenfold. Hurricane strength is directly related to the heat of the water where the storm forms. More water vapor in the air from evaporating ocean water adds fuel to hurricanes that build strength and head toward land. Hurricane Katrina is widely considered the measure for a destructive storm, holding the maximum Category 5 designation for a full 24 hours in late August 2005. It lost strength as it passed over the Florida peninsula, but gained destructive power fight before colliding with New Orleans, killing more than 200 people and causing $ 80 billion in damage. The study points to a gradual increase of Katrina-like events. The warming experienced over the 20th century doubled the number of such debilitating(将人类摧垮的)storms. But the ongoing warming of the planet into the 21st century could increase the frequency of the worst kinds of storms by 700 percent, threatening coastlines along the Atlantic Ocean with muitiple Category 5 storms every year. "Our results support the idea that changes in regional sea surface temperatures is the primary cause of hurricane variability," said Aslak Girnstead, a researcher with the Center for Ice and Climate at the University of Copenhagen. The large impact of small sea-surface temperature increases was more than Girustead and his colleagues had anticipated. The entire study was published in the Proceedings of the National Academy of Sciences. Global temperatures have steadily increased, making the past decade the warmest on record. Earlier this year, climate researchers reported that the Earths temperatures have risen faster in the last century than at any point since the last ice age, 11,300 years ago. The primary cause, a couseusus of scientists has said, is the rising emissions of greenhouse gases like carbon dioxide and methane. Past hurricanes have supported the studys finding that global temperature rise is linked to more destructive storms. According to the National Center for Atmospheric Research, while the frequency of storms doesnt appear to have increased, the percentage of strong ones has risen sharply over the past few decades. The trend may be similar further back in time, but comprehensive hurricane data doesnt exist. According to the team of international researchers based at Beijing Normal University, the rise of the Earths temperature is likely to cause

A.the coming of ice age

B.more Katrina-like or worse hurricanes

C.less intense hurricanes

D.more greenhouse gases in the atmosphere