While there has been public debate about whether running is good for your health for a long time, experts agree that running has more benefits than the costs. Some people are concerned that the pressure on your knees and ankles can be detrimental. While this can be true, there are many things that you can do to reduce your risk of injury.

    You should always go to a doctor for advice before you begin any type of exercise program. Then, a good pair of running shoes can be helpful as your feet hit the ground. They will help protect your ankles by providing stability to your feet. So it is good idea to visit a specialty(专业) running shoe store. The staff there can suggest shoes which are ideal for your running style.

    In order to learn the proper form, you may get some advice from a friend who has been running for some time, or even join a running club. They can provide good tips as well as some support and encouragement for you.

    Lastly, it is important to start out slowly. When it comes to getting in shape and losing weight , short bursts of speed followed by periods of slower movement would be proper. Aim for around 30 minutes of exercise a few days a week. As you get better, you can increase your speed. Always allow your body to rest in between heavy exercise as your muscles need time to bring energy back.

    Follow these instructions and your running experience will be a great one!

1.In the expert’s opinion,______________________.

A. running is good for your health as well as your mind.

B. you should buy running shoes in an expensive store.

C. running has more advantages than disadvantages for you.

D. you should go to the doctor if you have a running injury

2.The underlines word “ detrimental” in Paragraph 1 probably means___

A. harmful        B. useful        C. expensive       D. rare

3.If you take up running, you should___________________

A. worry about the pressure on your knees and ankles

B. ask the shopkeeper for a pair of running shoes

C. take advice from friends whom you will start running with

D. join a running club so that you can get encouragement

4.What can we infer from the passage?

A. More and more people have become interested in running.

B. Good running methods can reduce the risk of injury.

C. It’s better to run as far as possible to lose weight.

D. The instructions in the passage are given by a famous doctor.

If the American government      the expert’s suggestion, the world economy would not be in such a mess now.

Directions: Read the following text and choose the most suitable heading from A-F for each paragraph．There is one extra heading which you do not need.

I have heard that fluoride can help stop dental decay, but I recently read that it is poisonous．Which of these is true? How can children use fluoride safely?

This question is answered by Dr Marcia M．Rich who practises general dentistry in Newholt．She is also a lecturer at the University and a writer for the monthly magazine Your Dentist Cares．

My answer to the first question is to stress that fluoride works well and is safe when users follow instructions．Young children have a tendency to swallow toothpaste, which is why they should only have a tiny amount of fluoride toothpaste on their toothbrush．If this simple measure is taken, parents can be confident that children will be protected against tooth decay, and come to no harm.

Almost all medicines have an adverse effect－or even be deadly－if they are not taken as directed．So you are right－fluoride can be poisonous if it is swallowed in very large quantities．It is for the reason that fluoride supplements can only be obtained on prescription from the doctor or dentist．Please be assured that fluoride overdoses are rare－in fact, I have never heard of any fatal incidents related to fluoride poisoning.

Scientific studies have shown that fluoride can help to prevent cavities as long as it is used correctly．If fluoride is abused, there is a risk of illness or even deaths in extreme cases．If a deadly amount of fluoride is taken, immediate first-aid could save a life．A person who has swallowed a large amount of fluoride will probably start vomiting．If not, the patient should be given milk or antacid and taken to the nearest hospital for emergency treatment.

Taking too much fluoride while teeth are growing can lead to a condition called dental fluorosis．The most likely cause is the swallowing of fluoride toothpastes by young children．It can also be caused by inappropriate use of fluoride drop or other fluoride supplements, for example when fluoride is already is already present in drinking water．  

The staff(员工) of the school ______to the expert’s lecture．for they feel interested in it．

 Over 150 senior citizens from across the province will______the expert’s training course.

A. take up                                                               B. make up

C. put up                                                         D. turn up