Grammar Skills

Exercise 2

Heart disease is the number one killer of both men and women in the United States and many other countries. To reduce your chance of having a heart attack, it is important to know the risk factors and eliminate any that you can. Two key factors, age and family history, although they are very important, cannot be changed. These include your weight  diet  and level of activity. First, there appears to be a direct link between a person's weight and heart health. If a person is overweight, his or her heart must work harder to deliver blood to all of the parts of the body. Researchers have also establish a strong link between diet and heart health. For example, eating foods like oatmeal  fish, nuts, and olive oil can lower cholesterol that might block an artery. Perhaps the most crucial factor is one's level of activity. Even moderate activity like walking the dog or gardening can be a deciding factor in how long a person will live. People who add more activity to their lifestyle almost always find a link between their increased activity and a better mood, higher energy level, and even weight loss. While these three factors are finally established as being important to heart, some people believe there are other factors as well. For example, some researchers are investigating a possible link between inflamed gums and heart disease  Taking care of your heart is important  To help you sort out the best course of action for you, visit the American Heart Association's Web site and click on some links.

Exercise 25

1. For what purpose should you think about your intended major?

You should think about your intended major to choose a university that is well-qualified and staffed in your major.

You should think about your intended major so that you can choose the best university with that major.

2. For what purpose should you visit different universities' Web sites?

You should visit different universities' Web sites in order to choose the one that best fits to you.

You should visit different universities'Web sites so that you really study where you like.

3. For what purpose should you think about your financial situation?

You should think in your financial situation in order to know what necessities you can cover up. 

You should think in your financial situation so that you'll know your possible credit score.

4. For what purpose should you think about your financial aid?

You should find out about your financial aid in order to know what percentage you can save.

You should find out about your financial aid so that you'll not miss that chance.

5. For what purpose should you find out about part-time jobs?

You should find out about part-time jobs in order to have some money and doing other things.

You should find out about part-time jobs so that you can study and work at the same time.

Exercise 26

1. Biology systematically classifies living things.

I like the study of biology because of its systematic classification of living things.

Biology systematically classifies living things so that is enough for me to liking it.

I like to classify living things, thus, I like the study of biology.


2. Biology explains the characteristics of living things.

I like the study of biology because of its explanation of the characteristics of living things.

For understanding the characteristics of living things, you should study biology, that's why I like it.

I like the study of biology because I can understand the characteristics of living things, therefore, I'm not so good at that class.


3. Biology explains the interdependence of living things.

I like the interdependence of living things, biology explains that, so I like the study of biology.

Biology explains the interdependence of living things; as a result, I can argue about that topic.

Since I began studying biology, I understand the interdependence of living things.

4. Biology encourages curiosity and research.

Biology encourages curiosity and research, that's why I'm consequently studying biology.

Biology encourages curiosity and research, for this reason, I enjoy studying biology.

I like the study of biology because it encourages curiosity and research.

Exercise 38

1. Both physics and chemistry are classified as physical sciences.

2. Neither mathematics can be classified as a biological science, nor psychology can be classified as a physical science.

3. Not only botany and zoology are normally considered biological sciences, but also they are generally requirements for a B.S. degree.

4. All liberal arts majors either have to take two physical science courses, or instead, all liberal arts majors could take two biological science courses.

5. In order to graduate, not only all students in college must take certain required courses, but also they have to take some electives.

Exercise 39

1. During the semester, she goes to class every day. This is a good idea.

- Going to class every day during the semester is a good idea.

- To go to class every day during the semester is a good idea.

- It is a good idea to go to class every day during the semester. 

2. She takes notes as the professor does the sample problems on the board. This is useful.

- Taking notes as the professor do the sample problems on the board is useful.

- To take notes as the professor do the sample problems on the board is useful.

- It is useful to take notes as the professor do the sample problems on the board.

3. She does the homework problems regularly. This take time.

- Doing the homework problems regularly takes time.

- To do the homework problems regularly takes time.

- It takes time to do the homework problems regularly.

4. She turns the homework in every day. This gives her a sense of satisfaction.

- Turning the home works in every day gives her a sense of satisfaction.

- To turn the home works in every day gives her a sense of satisfaction.

- It gives a sense of satisfaction to her turning the home works in every day.

5. She gets good grades. This is the best reward.

- Getting good grades is the best reward.

- To get good grades is the best reward.

- It is the best reward if she gets good grades.