― Andrew won the first place in the physics competition.

― ______? I am not interested in science at all, anyway.

        A. What’s up          B. So what             C. What if                D. How come

― Why are you so popular with your students?

― As a teacher, I seldom give my students so difficult a problem ____ they cannot work out.

A. as                       B. that                      C. if                       D. which

―Oh, your clothes are all wet.

―I ______ in the rain, preparing for an open-air performance.

      A. have worked          B. worked          C. was working      D. have been working

― Jimmy had a lot of parties recently.

―Yes, that might         why he didn’t do well on the test.

A. sum up             B. push for            C. account for         D. make sense of

 ― Would you mind if I asked you where you’re from?

― _________.

A. Of course. I’m from London.                       B. Sure. I was born in London.

C. Not really. You can do it.                                D. Not in the least. I’m from London.

目前，食品安全问题引起了人们的厂‘泛关注。一些生产厂商为了降低成本追求利润，缺乏足够的安全措施，致使一些劣质或有害食品流人市场，对人们的健康产生极大的危害。请你就此事给一家英文报刊写封信，谈谈个人看法并呼吁整个社会关注此事。    ’

    要求：词数1()0左右。(不包括所给内容)    ，

    参考词汇：利润：profit；安全措施：safety measures    

Dear Sir, I' m writing to talk about the problems of food safety nowada

 Yours truly，

Li Hua

Earthquakes and volcanic eruptions usually cause the largest, most disastrous debris ( 碎石) flows. A great many victims of the earthquake that struck Wenchuan of Sichuan province last May were killed not by the quake itself but by the sudden large amounts of debris that followed.

Most debris flows occur where the soil is composed mainly of sand or colluviums ( 崩积层) . Loose soils made up of bits of sand or colluviums fall apart easily and are main material for fast -moving debris flows.

Scientists have conducted endless experiments to find out how debris flows work. They have learned that the amount and the timing of water entering the soil are crucial ( 决定性的). Typically, that means debris flows often occur when a long rainy period of many weeks is followed by an intense, brief heavy rain.                              .

More often than not, however, debris flows are started by water, in the form of rain, snow, or river flow. In 1998, heavy rains from Hurricane Mitch unleashed about one million tons of mudslides, burying thousands of people, in Central America.

Water flows through the soil until it hits a hard layer of bedrock or clay. There the water builds up, filling the tiny spaces between the soil and rock. That buildup reduces the natural friction (摩擦力 ) that keeps the rock and soil debris lying on the slope. If conditions are approaching dangerous levels, the slope will then fall down.

Despite what scientist know about the fact, debris flows are still impossible to predict at present because there are many other uncertains affect the stability of each slope. However, one thing is known: On hillsides where one debris flow has occurred, another will eventually follow. The next debris flow could take days, weeks, or years to happen.

72. The passage is mainly about ____.

A. when and where debris flows occur    B. the experiments that scientists conduct

C. the causes of debris flows                  D. the possible ways to predict landslides

73. Debris flows usually take place ____.  

 A. during earthquakes and volcanic eruptions

B. after a heavy rain or an intense snowstorm

C. when there is a right amount of water entering the soil

D. when a long rainy period is followed by a heavy rain

74. The underlined word "unleashed" in the 4th paragraph most probably means ____.

A. released            B. organized        C. provided          D. invented

75. We can infer from the text that ____.

A. water can flow through a hard layer of bedrock or clay               

B; the friction can keep the rock and soil debris flowing

C. debris flows can never be predicted by scientists

D. debris flows tend to happen on the same hillsides

Crime in the city of Clio hit a 30-year low last year. “This is absolutely wonderful for our citizens, our businesses, and our visitors," said Police Chief Louis Gates. Clio has a population of 28,000, but it has at least 30 gangs ( 帮派). The gangs make most of their money from dealing drugs and offering "protection.” They also commit violent crimes, such as stealing, robbery or even murder.

There were 1,486 thefts last year. Most of the thefts involved cars. Thieves also robbed the people at gunpoint or pick pocketed them. They broke .into houses and businesses at the alarming rate of two a day two years ago, but that rate was down to only one a day last year. "That's a 50-percent

decrease in one year," said Gates. "I think the police officers deserve a big pat on the back. Even better, maybe they’ll get that 10-percent raise that they are all hoping for. "

With an example of how the police force has helped reduce crime, Gates talked about bicycle thefts. "For years and years, kids were locking up their bikes at bike stands in front of schools, libraries, and shopping mails. About 10 percent of the time, the kids would come out of the school or wherever and discover that their bike was no longer there. We wracked our brains( 绞尽脑汁) trying to find a solution to this problem. Finally, at the beginning of last year, when we simply removed most of the bike stands, then the bicycle theft rate came down quickly.

Most cities in the state have similar problems. They all involve too many people, too much crime, too few police, and too little money. These problems go along with civilization everywhere. They might reduce, but they will probably never disappear. All people can do is hope for the best and prepare for the worst.

68. Crime in the city of Clio is mainly caused by _____.

A. illegal gangs    B. protection providers  C. cruel murderers    D. drug dealers

69. The underlined part in the 2nd paragraph probably means the police in Clio ____.

A. hasn’t done well in the prevention of crimes. B. is responsible for alarming rate of crimes

C. is worth praising for what they have done       D. is faced with sudden attacks from behind

70. The police force has helped reduce the bicycle theft rate by _____.

A. removing most of the bike stands          B. asking kids to lock up their bikes

C. setting up more public bike stands         D. asking kids to park their bikes in front of schools

71. The author wants to tell us that _____.

A. crimes are part of civilization in some of the cities        

B. the best will completely defeat the worst in development

C. crimes and civilization are two sides in development

D. civilization development leads to problems in cities

When people get bad toothaches, they often have to eat soft, easily chewed food. When lions get bad toothaches, they eat people? That' s the conclusion of a zoologist at the Field Museum of Natural History in Chicago and a dentist who works on carnivores (食肉动物)., Lions don’t normally prey on people. Every once in a while, however, a lion will go on a human-eating diet. The most famous such tragedy happened in 1898, when two lions killed and ate 135 railway workers in Kenya.

Examining the preserved skulls (骷髅) of the two big cats, zoologist Bruce Patterson and dentist Ellis Neiburger found that both animals had been suffering from several dental and |aw problems. One lion had three missing teeth and a loose, unsteady lower canine that was probably useless. Canines are pointed teeth that hunting animals use for gripping and piercing prey(刺穿猎物)) .The two lions might have been so badly disabled that they couldn’t bite down forcefully, say the researchers. Consequently, the lions might have abandoned their normal, more difficult prey and turned to humans. "Humans are easy preys, " said Patterson. "We're very slow, we don’t hear very well, and we don* t see very well in the darkness. "

The research calls their idea the Infirmity Theory. It was inspired partly by the work of Jim Corbett, a tiger hunter in India in the 1930s. Corbett was regularly called in to hunt tigers that had been dining on Indian villagers. Time after time, Patterson discovered that the killer tigers were suffering from some ill-healthy conditions.

64. The original aim of the study is to look for ____.                               

A. ways of protecting wild animals           B. ways of treating toothaches of lions

C. when and where lions eat people          D. reasons for some lions eating people

65. The reason why lions don't normally prey on people is ____.

A. that they like wild preys better              B. they just hunt for prey at night,

C. that humans are difficult to catch          D. not mentioned in the passage

66. Jim Corbett' story is mentioned in the last paragraph to show that ____.

A. tigers have the same eating habits and preys as lions

B. carnivores hunt people mostly under ill-healthy conditions

C. tigers like hurting villagers while lions like railway workers     

D. wild animals swallow humans when they suffer from toothaches   .

67. The best title of the passage could be ____.

A. A Zoologist And a Dentist                     B. Why Do Some Wild Animals Eat People

C. A Discovery of the Skulls of Lions        D. How Can Health Influence Eating Habits