牛津译林版（2019）选择性必修一高中英语Unit 4 Exploring poetry Reading课后作业

He needed to make a complete.

What you say to yourself can.

things we need to do.

This school to solve problems independently.

Social work is different from other professions, because we .

Teenagers' fitness is now a major concern, and physical exercise is very important. It reduces stress and improves fitness. Exercise makes your body strong, and helps you to keep the right body weight. Sports scientist Dr. Helen Lopez offers the following advice to teenagers: "First, you need to find out your present level of fitness. Then you can design a programme that will help you become healthier."

Dr. Lopez suggests that there are three levels of fitness that need a change of lifestyle. "Overweight" means that the person gets very little exercise and often has a serious weight problem. "Inactive" means that the person does not join in many physical activities, but is not seriously overweight. "Active" refers to people who take part in sports and other physical activities, but do not have a high fitness level.

According to Dr. Lopez, overweight teenagers should work out to keep healthy. "Ride a bike, play volleyball or basketball for a while, and go for a twentyminute walk each day. All these will help to burn calories." Inactive teenagers should do similar activities, but add some bending and stretching exercises, such as pushups and situps, starting with twenty of each a day. "Inactive people can take a little more exercise than overweight people because their bodies are stronger," Dr. Lopez said. The same rule applies to(适用于) active teenagers.

Dr. Lopez suggests one hour a week or more on running and other forms of intensive exercise, together with fifteen minutes a day spent on stretching and bending activities.

"These are really important in order to prevent injuries." Dr. Lopez said. Some weighttraining and other bodystrengthening exercises could also be planned in the programme in order to increase the person's strength.

Is Dieting OK for Kids?

You may know some adults and kids who worry about their weight and say they are going on a diet. You might wonder if you should be on a diet, too. Why? Let's find out.

Dieting to Lose Weight.

When someone diets to lose weight, the person is trying to eat fewer calories than the body uses. By doing this, the person may lose body fat and decrease his or her weight. Similarly, if a person eats more calories than the body uses, the person may gain weight.

Kids usually do not need to diet in this way. During this time, kids need many kinds of healthy foods to keep their bodies growing properly. Some kids are overweight, but even overweight kids often can improve their health simply by eating nutritious foods and being more active. But kids may hurt their health even more by doing something drastic(极端的), like skipping meals or deciding to eat only vegetables.

Who Needs to Diet?

Though some people may feel they weigh too much or too little, there is no perfect body shape. Some people have bigger bones and will always look bigger and heavier than people with smaller bones.

Your doctor can examine you and check your body mass index(身体质量指数). That's a way of estimating how much body fat you have. If the doctor is concerned about your weight, he or she can recommend a couple of goals.

For some kids, the doctor may recommend losing some weight, but this should be done with the doctor's help. Kids who need to lose weight may visit with a dietitian who can explain how to reduce calories safely while still getting all the necessary nutrients.

A. It is important to form a good eating habit.

B. Being overweight can cause health problems.

C. Not eating properly can be very harmful to kids.

D. Unlike adults, kids are still growing and developing.

E. Talk to your doctor if you have questions about your weight.

F. All foods and many drinks contain calories, a kind of energy.

G. However, most of kids do not need to and should not diet this way.