It is the first report that home-grown food has been contaminated by radioactivity, largely Iodine(碘)-131, since the ministry ordered radiation( powerful and harmful rays that are sent out from radioactive substances) tests on food and water at the end of March in 14 mainland regions including Beijing, Tianjin, and some coastal provinces.

Sample inspections conducted on Tuesday found low levels of radioactive iodine in spinach( a kind of green vegetables) planted in Beijing, Tianjin and Henan province --- about 1-3 becquerels per kilogram (Bq/kg), the statement said.

"The contamination level detected is too low to be harmful to public health," it said.

According to health experts, radioactive iodine can accumulate in humans once ingested in high concentrations and increases the risk of thyroid cancer. But it decays naturally within weeks.

Leafy vegetables grown in the open like spinach, lettuce and leek are among the first foods to be tainted by radioactive deposits.

Raw milk is also susceptible to radioactive contamination as livestock feed on grass.

Tests carried out in March showed spinach and milk taken from farms near Japan's nuclear-stricken area had exceeded(go beyond) government-set safety limits for radiation.

No cases of tainted water or milk have been reported in China but the ministry vowed to further strengthen monitoring.

Wang Zhongwen, a researcher at the China Institute of Atomic Energy's radiation safety department, told China Daily on Wednesday that currently China only had the means to conduct food radiation tests in a few regions.

The statement also said that recent rain in Beijing and Tianjin meant radioactive substances could have fallen on vegetables.

Chen Jicang, a vegetable dealer in Beijing, said on Wednesday that concerns are growing among consumers, businesses and governments across the world.

"We have yet to see any impact on our business from the radiation, but we will keep a close eye on how the issue develops," he said.

He added that most vegetables consumed in Beijing are produced locally, and he might switch to other varieties if spinach sales suffer.

Yang Guoshan, a researcher of radiation medical science at the Academy of Military Medical Sciences, said people could safely eat products that contain low levels of Iodine-131.

"The radiation level is so low that residents don't need to spend any extra effort on cleaning them," he said.

Gao Jie, a 52-year-old resident in Tianjin said she is deeply worried because spinach is a staple part of her family's diet.

"If spinach is radioactive, is there any possibility that other types of vegetables are safe?"

Trace levels of radioactive isotope cesium-137 and -134 were detected in the air in 21 provinces and regions on Wednesday, up from 17 on Tuesday, according to China's National Nuclear Emergency Coordination Committee.

What does the underlined word mean in para 1?

A. protected  B. contained   C. polluted by dangerous substances   D. tested

Why are the spinach and milk taken from nuclear-stricken area not safe?

A. Because tests have been carried out there.

B. Raw milk is sensitive to radioactive contamination as livestock（家畜）feed on grass.

C. The amount of radioactive substances goes beyond the safe limits for radiation.

D. Japan is a nuclear-stricken area.

Where do you think this passage comes from?

A. a magazine   B. CCTV news  C. a journal   D. a novel

What is not mentioned in the passage?

A. Consumers became concerned about the safety of vegetables.

B. People need to clean vegetables completely before cooking because of radiation.

C. Food and water have to be tested since the end of March in 14 mainland regions

D. Low levels of radioactive iodine has been found in spinach in Tianjin

What do you think is mainly talked about in the passage?

A. How the radioactivity came into being

B. What we should do in face of radioactivity.

C. Radioactivity has no side effect on human being.

D. Home-grown food has been affected by radioactivity.

 There was a king who loved art very much. One day a(n)  36  came and said, "Please let me  37  a picture on a wall." The king happened to have a big new hall  38  . So he  39  the artist to work on one of the walls.

     At the same time, another artist came and asked to work on the  40  wall. He promised he would make the same picture as the first artist’s  41  looking at the first artist’s work. The second artist asked to have a thick curtain  42  between the two walls  43  neither of them could see each other.

     The following day they began to work. The first artist brought in a(n)  44  supply of paint, oil, water and so on. The second one came with a  45  and a bucket (桶).

     A month later, the first artist’s work was completed, and the second artist said, "My wall is  46  too!"

     The king went to  47  the first artist’s wall. He was pleased with it and gave the artist a large  48  of money. He then asked people to open the curtain.

     49  ! Each line was  50  the same as that on the opposite wall.

     The king was quite satisfied and gave him double money. However, he  51  how the second man had made it.

     "I just  52  the wall with the cloth," the man said  53  .The wall was made of white marble (大理石). He made it shine like a mirror. The reflection (倒影) of the first painting  54  up on it!

     The  55  is a reflection of you too. If you are sad, the world will be sad. If you are happy, the world will be happy.

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 In the botanic garden we can find a（n）______of plants that range from tall trees to small flowers.

Reading Comprehension
Section B
Directions：Read the following passages. Each passage is followed by several questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choose the one that fits best according to the information given in the passage you have just read.
　　Are organically grown foods the best food choices？The advantages claimed for such foods over conventionally (传统地) grown and marketed food products are now being debated. Supporters of organic foods—a term whose meaning varies greatly—frequently announce that such products are safer and more nutritious than others.
　　The growing interest of consumers in the safety and nutritional quality of the typical North American diet is a welcome development. However, much of this interest has been sparked by sweeping claims that the food supply is unsafe or inadequate in meeting nutritional needs.  Although most of these claims are not supported by scientific evidence, the flood of written material advancing such claims makes it difficult for the general public to separate fact from fiction. As a result, claims that eating a diet consisting entirely of organically grown foods prevents or cures disease or provides other benefits to health have become widely publicized.
　　Almost daily the public is besieged by claims for “no-aging” diets, new vitamins and other wonder foods. There are numerous unproved reports that natural vitamins are superior to synthetic ones, that fertilized eggs are nutritionally superior to unfertilized eggs, that untreated grains are better than fumigated grains and the like.
　　One thing that most organically grown food products seem to have in common is that they cost more than conventionally grown foods. But in many cases consumers are misled if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods. So there is real cause for concern if consumers，particularly those with limited incomes, distrust the regular food supply and buy only expensive organic foods instead.
1.The “welcome development” mentioned in paragraph 2 is an increase in ______.
　　A. attention to food safety and nutrition among north Americans
　　B. the nutritional quality of the typical North American diet
　　C. the amount of healthy food grown in North America
　　D. the number of consumers in North America
2. The author implies that there is cause for concern if consumers buy organic foods instead of conventionally grown foods because ______.
　　A. organic foods can be more expensive but are often not better than conventionally grown foods
　　B. many organic foods are actually less nutritious than similar conventionally grown foods
　　C. conventionally grown foods are more readily available than organic foods
　　D. too many farmers will stop using conventional methods to grow food crops
3.What is the author’s attitude toward the claims made by advocates of health foods？
　　A. Enthusiastic.  B. Favorable.  C. Neutral.  D. Distrustful.