Today there are 6 billion people on the earth. By the year 2050 there may be 12.5 billion. There will be a lot of people to feed. We need more food.

One way to produce more food is by growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic material(遗传物质). Foods from plants grown in this way are called genetically modified foods(转基因食品), or GM foods.

By changing the genetic material of a plant, it is possible to make new plants. They make plants which are strong against plant diseases. They can also help in our diseases: a kind of rice is being prepared, for example, which stops people from becoming blind.

Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.

GM plants are not natural. No one knows how good or bad they are. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them, because they are unnatural. They may feed people, then hurt them or their children later. But, both rich and poor countries are very interested in their use, and they are not going to go away. In 2050 we may think differently about them.

1.GM foods ________.

2.Why do some people not like GM foods?

3.From the reading we know that ________.

Many parents today worry about their children's diets. Then what is a healthy diet for children? Miss Jones from Happy Children Hospital gives the following advice(建议):

Children shouldn't eat food with too much salt, because it can cause high blood pressure(高血压).

Children should eat food with less fat, oil and sugar. They should not eat too much junk food.

Fruit and vegetables are rich in vitamins（维生素）. Children need to eat fruit and vegetables often.

Water is important to everyone. Children need to drink enough water every day.

Children need to eat breakfast every day. It is good for their bodies and minds.

1.Miss Jones is possible a ________.

A. doctor B. teacher C. shop assistant D. a waitress

2. What does the underlined word " junk food " mean in Chinese?

A. 绿色食品 B.垃圾食品 C.天然食品 D.营养食品

3.According to Miss Jones, children should drink________ every day.

A. enough juice B. enough water C. enough coffee D. enough milk

4.Which kind of food is rich in vitamins?

A. Water. B. Junk food. C. Sugar. D. Fruit and vegetables.

5.What is the best title（标题）of the passage（文章）?

A. Bad Habits B. Junk Food

C. Advice on a Healthy Diet D. An Unhealthy Lifestyle

In the past, when people had problems, they went to their families or friends to get advice. Today it is possible to get advice from radio shows, TV programmes and telephone hot lines, too. Most telephone hot lines are completely anonymous---callers do not have to say their names or telephone numbers. Most hot lines are usually free, too, even if the calls are long distance(距离). Other hot lines pay their advisers for their work. Usually the advisers are professionals with years of education and experience, but sometimes, the advisers have only taken a short class before starting to work on the hot line. All the advisers listen to people and help them solve their problems.

1.Today when people have problems, ________．

A．they can only ask their families for help

B．they can only get help from their friends

C．they can get help from telephone hot lines

D．they go to the advisers to get help

2.Callers          the hot line for the advice or the phone calls．

A．pay much                                                                     B．have to pay

C．don’t have to pay                                                        D．get money from

3.The advisers working at the hot line                ．

A．are usually professionals                                          B．have all taken a short class

C．can solve any problem                                              D．are not all paid

4.How do the hot line advisers work?

A．They do what the callers tell them to do．

B．They go to the callers to help them．

C．They give advice to the callers by phone．

D．They ask people to come to see him．

Escaping a fire is a serious matter. If you know what to do during a fire, you can   __1__ a life. It is important to know the ways you can use and  __2__ them to everyone in the family, such as stairs and fire escapes(安全出口). You shouldn’t take lifts. From the lower floors of the building, escape __3__   windows is possible. Let’s learn the best way of leaving by window with the least chance of serious injury(受伤).

   The first floor window is usually not very high from the  ___4____ . It is about the height of a man. Of course, it is safer to jump a short way than stay in a burning building.

   Windows are also very useful when you are___5___ for help. Be sure to keep the door ___6__ before opening the window. If we don’t do that, ___7__and fire may come into the room. Keep your head low at the window to be sure you get__8__ fresh air instead of smoke.

    On the second or third floor, the best windows for escape are those __9____open onto a roof. From the roof a person can drop to the ground more __10____ .Dropping onto the cement(水泥地) might end in injury. Trees and grass can help to break a fall.

1. A. help        B. make      C. save      D. give

2. A. speak       B. take       C. show     D. say

3. A. out         B. through    C. into      D. on

4.A. roof        B. earth      C .land      D. ground

5. A. needing     B. doing     C. wanted    D. waiting

6. A. open        B. closing    C. opening   D. closed

7. A. firemen     B. wind       C. water    D. smoke

8. A. enough      B. little      C. a few     D. few

9. A. who        B. what      C. which     D. where 

10.. A. dangerously  B. easy      C. safely     D. carefully