Question

reading nonfiction
read the story. then, answer the questions.
healthy heart and lungs
your heart and lungs are important parts of your body. the heart moves blood through the body. without lungs, you could not breathe. you must exercise to keep your heart and lungs healthy. your heart starts beating faster when you run fast or jump rope. you may breathe harder too. it is good to make your heart and lungs work harder sometimes. this makes them stronger, and you will also feel healthier. keeping yourself healthy can be a lifelong practice so that you can have a long life.

1. what is the main idea of this story?

a. your heart works harder when you run.
b. without lungs, you could not breathe.
c. exercising keeps your heart and lungs healthy.

1. what does the heart do in the body?

1. what do lungs help you do?

1. what happens to your heart when you run fast?

a. it starts beating faster.
b. it stops and starts.
c. it makes you breathe harder.

1. what happens to your lungs when you jump rope?

1. why is it good to make your heart work hard sometimes?

Explanation:

Question 1

• Option a: Only describes a detail about the heart when running, not the main idea.
• Option b: Only describes a function of the lungs, not the main idea.
• Option c: The passage emphasizes that exercise is needed to keep heart and lungs healthy, which is the main idea.

From the passage: "The heart moves blood through the body." So we extract this sentence to answer.

From the passage: "Without lungs, you could not breathe." So we can conclude that lungs help you breathe.

Answer:

c. Exercising keeps your heart and lungs healthy.

Question 2